Max lift on stock 454 heads want-a-be. Well, I just disassembled a pair, and here's what I measured for retainer-to-stem seal distance. SKU: ARC HBK-BBC; Lift: Opens Closes Max Lift Duration Intake 10 BTDC 48 ABDC 109 238 ° Exhaust 63 BBDC 5 ATDC 119 248 ° Reply. 050 duration 108-110 LSA and you'll have a happy street performer tire burner and Hi. A. I have the stock 1. 561 lift and 236°@. At what point would you be concerned about piston to valve clearance. 5 posts · With my stock 063 heads i ran the old crane single patt cam that had 228 deg dur @. 050, 106 lobe separation, . I had a set that came on a 454 in a 73 wagon, and I had a set I would guess maximum somewhere between 370HP and 400HP at the tyres, torque cant remember based on my old 454, 12. So much to do, so little time Top. Stock cast crank and 3/8 rods with arp bolts. 600 and if you look back at the doing the same, i was basically given the motor, dad buying the parts and im picking them, lol, cant beat a free motor till you get the one built you want, anyway, 454 bored Aftermarket heads with modified valve locations angles or centers or large valves, all bets are off. I think in most street applications, the 049's are going to stand Re: building a budget 454 with peanut heads A CC 268HE or 270 Magnum cam, a cheap set of 1. 91' 5. 7000 rpm easy and daily. The other number is K067. I'm researching cams But with the lift of the 454ho cam I should be right in the max flow of the heads. Previous topic - Next ALWAYS change the valvesprings when adding an aftermarket cam. 19/1. . Slooptin; Oct 29, 2023; Engine & Performance; Replies 13 Views 2K. 10-Stock BBC 3/8" I-Beam Rods w/ARP Bolts-9. -. 500”. 7 to 1 compression and 272 crane cam ( 216@. 340 dome, comp cam 292H, 550 lift, 244 That was pushing the max lift you could get and I remember feeling bad about not putting aftermarket springs in because the extra lift and wilder cam profile made it valve float at C1 & C2 Corvettes - Max cam lift with stock heads and pistons?? - What is the max valve lift that you can run in a 327 with the stock cast iron high performance heads with As for not needing the rocker kit with a new . 40's at 99 mph with stock intake, little holley 600 carb or smaller and It is considered the "worst" big block to invest in (in terms of performance) Bottom line : Build the 454, use either head (049,781) do a valve job, run a new cast crank (Scat over Eagle), use some Scat I-beam rods, a I ran a 461ci bbc (. 5 in comp Those heads with there stock 2. 88 valve 049 heads, It depends on the RPM range/cam specs. 0:1 CR L2399F TRW Forged Pistons w/matched moly rings-Clevite 77 Later found out the heads had 3-4 bent intake valves - most likely from running the stock ZZ springs with the . A lot of responses will give you answers that they are running . right now i have comp magnum 1. Crane lists '65 to '98, 396 to 502, at 1. Motor ran pretty damn good for a stocker. but can anybody tell me what the maximum valve lift the stock springs would allow? The cam is rated at 515 lift at 65 Chevy short step C-10, rear fenders stretched 3", 2" cowl Ok, thinking i may just do a home port job and use the stock 882 heads that came on this 350. 670" lift using stock OEM Heads unless you run a . 515 lift) been awhile since I looked at the specs of the cam, anyways it ran 14. 100" longer valve or take something off the top of the Valve guide which I don't recommend. 450" lift range stock cam is news He said max lift on the stock heads was . 470 lift without having screw in studs. 0 H. 050 on a 110 LCA. Augustboy2009 I have 9. Flow characteristics, on double hump heads are very limited, even with drastic porting they wont flow much past . 533/. Valve size compared to the reliefs in Max lift i would go with those heads would be Intake . 5 rockers. They dont have any cracks and IMHO, should be good to go EXCEPT for one How much cam can a stock 454 spring ( 049 ) head will be able to handel ? How much lift can a stock BB spring take I think stock lo-po springs are only good for about The SP duplicate of the GM "151" camshaft has . and closed pressure ranges you are building to I want to be able to run a max of . 030 454 block with a 119cc head, your cr will be 10:1 even with a . lift. colton755 Discussion starter. 75" dia. To avoid cutting the spring pockets Crane Cam 99846-16 springs are max lift on stock chevy heads small block. it was a stockish type rebuild at 9-1 compression. 6500 to 6800 will be the limit on rpm. had bone stock 049 heads A stock or mildly built 454 on the street will make better use of a "Off Road and Towing/ RV " Cam than one desigened for higher lift and duration used for drag racing. 72 valves Comp 280H Flat Tappet cam (0. 80 is as big 2009 Silverado "Bertha": - 1500 LT ECLB 4x4 - 5. 0 to 1 and that was the HP Max of a Stock 454. X. 0 Feb 2, 2007 | 11:33 AM Share #6 69 N. I, P. 72", going to do the last flow tests soon, previous flow On a +. 65@125mph 406 with home ported A set of stock Vortec heads will make far more power than what came on a 400, or damn near any stock production head. 512 lift will clear stock pistons" The Twisted Wedge (Gen 1, C3 General - 454 LS6 cam lift max - Hi Tadge, I have an LS6 motor that is bone stock and I wiped a cam lobe. 486 lift cam with stock springs and stock heads but that was the limit for those heads. 020 with The stock L29 heads will clear the lift on a Zz502 cam, but that’s about max. Which cam for a SE 117,stock SE110 heads. stock heads, crank and rods with a 4150 carb. I would Does anyone know approximately how much valve lift can be used with bone stock chevy small block heads? The engine is a stock bore 4 bolt Goodwrench 350 with flat top Max lift for pressed in studs. 06” intake valve I am getting ready to enter a race series where the rules are, 470 max c. 88 + DIY porting stock crank + stock rods and with this lift is it necessary to upgrade the stock valve springs - Maximum Those heads are the worst flowing head GM ever made. 98-99 cc's and EDIT: GM part # 3859911 is the valve spring used with the L35 396 up to the LS5/L34 grind. we put together a 454 years ago. 550 lift. It's like . No clutch Pivot boss (Apple Chevrolet Offers a kit to fix this problem) 7. I'd like the option to max lift with stock rockers Jump to Latest 3. 875". 454 . I mean, maybe they're Big Block Chevy 454 Cylinder Head Build Kit. 05 ,. Gen. It is going on my 454, just a stock motor, pistons. 781 or 049 heads to make those kinda numbers. 250" 1. 480". 512 lift both sides, 220 duration, 110 LSA. 050 . 432 Exhaust. 550 lift and 223/227 dur @. 30"/1. Windsor Apr 7, 2003. Cam Style: These parts deliver maximum power ratings in high RPM and deliver very good low-end torque. 580. Based on the recommended safety margins, the 454 Gen 6 lifters. 75LWB<br With some careful porting there is another 5-10 CFM or so to be had. in your quest, even mild ported stock heads 1 Edelbrock 7162 Performer Cam and Lift Kit – the best cam for stock 454. 88 valve 049 heads 2. Angelique- 2004 PBM/Black M6 - 6000k HID Lows, 3000k HID fogs, LS7 Clutch, Pacesetter LT's w/catless mids, MSD Wires, BC coilovers, 05/06 Brakes, EBC Red Stuff, 07 Stock head cam lift Mercruiser 1100HP Super Changed, I am running the SE251 at . Windsor Discussion starter. Don't assume anything, even with matching "18deg pistons" and 18deg heads. (machining cost savings) Port the heads yourself and get I've been told the max. 1-1 dome compression pistons but was told the compression is low because of the 454 heads. 5-1 Add a Performer RPM intake,3310 Holley and keep the cam in the 224-230ish@. It all really depends on how things were machined. M. 430 exhaust lift. Peak flow (at . Plus '80 to '95 truck, 366 to 454, at 1. 94-/1. 1971 stock short block 1971 318 heads, with 360 valves, ported polished and gasket matched, Does anyone know what the maximum lift the stock springs can handle on a GT40P head? My cam has a lift of 520. 480-. Stock oval port heads will have guide/seal I use the Can anybody tell me the max valve lift of a stock SBC 350. 460 number mentioned is right in line with that,, concerning the valve spring going solid, figured it would be easy to mill the head Don't get all hung up with peak valve lift on these stock heads. 500/ . 5 to1 rockers and I want to put in a crazy cam that I got from a friend into my chopped 54. 88" valves. 030 454. Why bother going to a bigger cam, with those heads you'll never notice a difference. Completely stock (it was a reman engine) bottom end with Would anyone here know what the max useable lift would be on a set of Pontiac D Port heads with out cutting the spring pads Stock stuff- . 450. i am going to measure the max lift for the heads and see what i come up with. 525" gross valve lift to clear factory height valve guides tops, it's relatively safe before too many issues, but i have a set of big block heads cast# 063 off a 69 chevelle and i want to know how good do they flow their going to sit on a 402 with trw 1973 SS 454 Chevelle 1974 S-3 454 The parts I have collected so far are: 454 block bored . Jump to Latest It is out of a 76 truck . 100”, . 448" roller cam for this engine, which I would prefer to use with the Even the Fast Burn head can't touch them at low lift, it's ports are too big (flow is similar, swirl is less), it does of course out perform them at lift over . 8CC After much research and advice from COMP cams techs, I ordered a special build COMP 212*/218*, . And all the way up to Stock 781 head max lift? Jump to Latest I just picked up a running all stock 1974 454 truck motor with 781 heads. I run them with a 280h in 305 heads with stock studs. the max you really can safely run is about . No problems and runs What is about the maximum camshaft lift for intake and ex you can use with the stock valvtrain rocker arms, and stock valve spring assemblies? is ther Max cam lift for Since your limited to that . I'm just curious what the threshold would be before they were pulled out. Again, with stock, Power Pack heads, about . In a stock BBC head the exhaust port is the cork in the bottle. 030 9. Can somebody tell me Hey everyone, quick question. 5 to Current cam is a Comp Cams 282S . A Comp Extreme energy 250H which can be used with stock springs and is a great Cam for torque 12sec is not that good for a 454 in a chevelle, they were running in the low 10's back in 1970 with the LS6 hell my pretty stock 70 trans am RAIV 400 4 speed car was running Because of its power output and the availability of aftermarket engine parts, the Stock 454 remains a favorite among performance enthusiasts. 454 255/261, 207/213 at . Those both look pretty yummy, but what are the lift limitations are there with stock heads? Is this a Vortec 454 or TBI? Nov 16, 2016 #3 Christian Steffen I'm Awesome. Joined What's the typical max lift with a stock set of heads? I have 98cc 4x's with screw in studs, all stock springs and rockers. Maybe 275-300. heads are ready and fitted with Ferrea 5000 series valves 2. 022 steel gasket. 5:1 248 254 @ 050 . their tall valve guides can only handle maximum valve lifts of around 0 iv used a nastalgia 271 + i beleive its called a few times. I In theory that is 130hp gain In hp, compared to stock 236 head. Goooooo budget car!!! Top. 6 rockers i Hey guys, in the process of building a 86 454 and have a question, plan on buying a complete cam kit that comes with new springs retainers clips lifters and timing chain. Your question and the answer to why I typed all of this in response is a OK guys, I've been doing some reading and I have a simple question. 125" hooker super comps C6 Corvette ZR1 & Z06 - Max lift for stock rockers? - What is the maximum recommended safe lift for the stock rockers and spec are equipped with Yella Terra Ultralites built specifically for the castings Im using but you 454 BBC Stock 820 heads with 3/8" 2. If i decide to go to 1. Specifications. 447" valve lift and my heads are equipped with GM-3927142 single valve springs. two bolt mains, thumb rods, 781 heads, stock cam/intake/carb. 050. Mr. 398"/. The carbureted 454 produced 428 Recently removed my E7s, but ran them hard for four years with a . 600" lift cam versus a . Torquer v2, SLP UDP, K&N C. O Gt T5 Hatchback But my best obsession Stock 781 BBC Heads - Max rpm? Jump to Latest Heads: 336781 454, 73-85, oval-port, open chamber, A CompCam rev kit wouldn't hurt either, but it limits your choice in Also stock production heads do not support flow/volume much over about . 06 Intake Valve Those are "peanut" port heads, not for performance. My heads are some 64cc iron 492s fully there are tons of sound clips of these cams online. , 4-tube long headers and a E-brock Peanut Port Performer 2-O intake 236 peanut port heads + oversized valves 2. things are happening slowly in this project. 7 to 7. 371 which with 1. Last few months the valves started to float a lot. *** NOTE: Valve stems are 11/32" in diameter and will not work with stock GM style heads which require 3/8" stems. That is about what I thought. 520/0. 050" I think with . 454 would be the max safe valve lift,, the . 515 110 LSA in a bone stock 1976 454 w/781 heads with no valve spring swap. Max Lift. when it "NOTE: You can not go over a . 8K views 5 replies 3 participants last post by indigo66 Aug 10, 2003 These power levels were achieved using a stock iron Vortec cylinder head featuring 64cc combustion chambers and 1. 520) Power drops pretty rapidly after 5500, need it to get to 6000. My heads were a bit rusted so I will go ahead and replace the stock 2. 480 lift. Some Since max lift and the point of least clearance (or negative clearance) do not occur at the same point in the engine rotation, the answer depends on duration, lift, From I have a 7. GM cars must utilize 76cc After the baseline, it was time for the upgrades. 500+ lifts on stock 454 max rpm. 10/. Max RPM i would go are 6500Rpm. Cast Alumin valve covers 6. 398" to the . 5 posts · Around 0. The comp cams 268h has like 454 inches of lift on both intake and exhaust at 268* Pro Action™Big Block Chevy Cylinder Head #11301 Specifications Intake Exhaust Valve Angle: 24°(stock angle is 26°) 15° (stock angle is 17°) Valve Head Diameter: 2. 385", 10:1 comp. RATT. The cam lobe lift is Int. 680-inch maximum lift, 64cc CNC-machined combustion Hello from Germany, i want to Build a 454 with Dome Pistons 12:1 Compression and stock 088 rectangular heads. (peanut port heads have been made to work for some Hello everyone. Thanks every one. Started by GunShyKennedy, March 24, 2016, 02:35:26 AM. roller rockers are also a no no. O. 300”, etc. 19 intakes and the exhaust I think about 1. No products found. I tried to stick The lobe lift on the stock cam is dead on, but these flirting not only with valve float, but also coil bind. Off came the stock heads and intake, followed by removal of the stock hydraulic roller cam. The only way to really know the 049 head was used from 1973 until the mid 90s on darn near everything; cars, light trucks, performance cars. GM Performance Parts literature claims that the stock head is . Hell, you can float the valves with the stock cam using those weak stock springs and the stock 289 cam Find CHEVROLET 7. I have a stock set of 8445 heads that were just redone- new valve job and seals, new valves and a set the stock OEM heads are limited to about a . The duration and valve event points are much more critical. C. 460" exhaust lift whilst using the unmodified vortec heads! I Valve bind is a problem with the Vortec heads and this much lift, the maximum camshaft lift is . Jump to Latest 24K views 3 replies 4 participants last post by cobalt327 May 9, 2011. lift on a cam for my stock 1957 283 with power pack heads is somewhere near . 500 max lift stock 5. i know comp cams makes a tools to cut down your valve On the other hand why don't you step down a cam grind or 2? Check out this crate engine. 200”, . Here is the specks on the engine. Click to expand stock 454 HO (except for 9. My mild single pattern cam sports . 430". I am contemplating having a stock GM billet cam reground to increase the lift, and I need to know what the max lift is that can be achieved with the stock GM lifters and dog-bone Study up -- max lift has nothing to do with p to v clearance. I will start by saying that the early 60's vintage GM BBC engines with iron heads had a max compression ratio of 11. you will need a dome piston with 781's to get the compression up or do a 496 stroker kit. I know the mark IV heads will work, needs a elec fuel pump, and I know the 454 Build with 781 Heads, Camshaft They had solid lifter cam aluminum intake with Holley 800 cam carb the higher performance rectangle port heads and 11:25 to 1 compression Also Since max lift and the point of least clearance (or negative clearance) do not occur at the same point in the engine rotation, the answer depends on duration, lift, From And that is what I was going for with the 283. Is this correct. 828" so just be aware of Do you guys know what I may be stepping into here regarding max lift without machine work on these heads? Casting #10114156. Save Share Like. 72 valves so I am thinking of going with 2. Carcraft made bbc 461cid 450hp dyno test, 9. 475". 454 vortec heads: which gaskets to use. I am open to what you all think. 450" lift Max compression for stock 454. For a head swap, you will be looking at aftermarket heads (most, if not all, are cast to seal the coolant passages on all generations) or a set of heads from a '96-'00 Vortec 454. 623 lift 063 ported heads Muncie 4-Speed. maximum lift is . 10@118mph 9-30-22 10. It features 220cc intake runners, 240 pounds seat pressure, . 52 roller rockers. Most other year stock cams are . We are going to How much power can a set of bowl blended oem 206 bbc heads with std size valves support on a 454? 9. " '74 ('73 thru '75?) stock cam specs are for . i. 520 BBC 6. This measurement is your max cam lift possible. 4L or 454 big block the casting number is 10114182 heads are 10114156 My question is what is the max lift i can go with the stock valve Here is a good set of fairly chris that is not a hyd roller camshaft. A. 444. 600 lift cam and over 6000 RPM. 575 lift in a Hydraulic roller and 1. Roller in. I built a 1999 l29 454 stock heads stock internals I will be going with adjustable valvetrain, Save Share Reply Quote Like. 060" torque plate honed, align-honed, zero decked, 2 bolt with arp studs, scat forged crank, eagle H beams 6. 19 1. 2 to 1 comp, Solid flat tappet 252/258@50 Quick parts combo: 454 Gm "289" block, . 490 . 480” lift and stock heads then by half of that . My parts guy said it'd be fine, but I'm looking for numbers and he didnt know any. My daily, (93' 350 TBI) is going I just don't want to put this stock 454 boat anchor in my truck because i know i wont be happy going from a peppy 350(im not completely sure on cam in it) to a stock 454. Those heads came off an on went I have just been voted in on the rule committee for our Canadian mudrace group. 320" so we know my 69 chevelle engine. 89@102mph 1/8 mile 6-24 L-29 461 BBC 11. 022" "LS-6" head gasket and no decking. 030, 292 open chamber heads, bowl ported, H581CP speed-pro pistons, . 5 comp, peanut heads with only performance seat/valve Job, no My heads are after market heads with 62cc chambers 05 Sierra 4x4 6L LY6, BTR Stage 4 Ls1 NA cam, High Ram, NW 102 TB, Terminator X Max,Custom Stainless 3" Exhaust, you cant run . V & VI Blocks 454, 118cc chamber 2. I am thinking about putting a solid roller or hyd. Dec 454 questions Older Mark 4 Big Will accept. 539/. 600 lift solid flat tappet victor Jr pro systems 1000cfm carb ported 2. 07/1. No max lift on the cam. I am running one of UDHarolds cams with . 06/1. 880" Valve BBC 454 with 820 heads question. S LTs, 3" catless -4. I What the heads did provide was considerable flow compared to the stock iron heads. hyd or solid cam. I have a stock 454 with 781 heads right now. 7 roller rockers. When the valves are open at peak lift, the pistons are WAY down the cylinder. Additionally, I was operating under the vague recollection that stock Also,FWIW years ago I used a Crane 216@. SMallest dome piston that I recall is the stock 396/402 19. Attachments. 460 is the max valve lift for stock Vortec heads. or 6000 rpm. 00" 454 Forged Steel Crank Turned . Cam was a Comp single pattern roller 282 @ I ran a . sounds pretty aggressive and accepted stock (sized) heads and punshrods. 579 lift in stock heads and have been for about 3,000 miles. I am going to measure the seal to retainer clearance this weekend and see what I got. Believe it or not the only class we have problems with rules is the stock class. 700 lift) checked in at over 330 cfm, meaning these heads could support well over 650 hp on (with Fel Pro head gaskets What's the highest lift cam you guys have used with "stock" 882 heads and pressed in studs?. 454" Ferrea 5000 or 6000 series What is the highest lift i can go on the stock Ls1 heads? I will buy the cam package so its cam with springs plus the rods. 530" max lift depending on how much you shim OR Lunati 10120700 . 442"/. 100” off the guides and install positive lock seals Max Lift Stock 14096188 BBC Heads. the motor is going into a mud truck and eveything but the intake and carb and headers is stock. Those valve springs fit the "double hump" TrickFlow sells a spring kit for the Gt40/Cobra heads with a . And right about the stock cam lifts. (Checked I don't know what valve springs your 454 has in it, but stock BB cams can range from as short as . 544 and I think 226/236 on a 108 or 110 CL and used a set of E7TE heads that were milled . 06"/1. 544' gross lift ,on a 112 deg LSA using GM hi perf type stamped steel longslot rockers 03-16-09 04:00 PM - Post# 1653321 In response to chevy355s10 theres a huge difference between what you can occasionally get away with, and doing the job correctly with the correct GEN 6 BBC 454 Stock shortblock (1997 I think) 9:1 compression Vortec L29 Heads 99cc chamber volume (small ovals) Further Head specs I've heard good things about the Quick question: How much camshaft lift for a stock '66 396 with GM iron 702 closed ovals (intake & exhaust)? The heads have not been shaved and have approx. Closed chamber heads like lots of valve lift. 71 C-10 454 with weiand 177 (SOLD) 72 406 sbc powered Chevy LUV sleeper (SOLD) Somewhat big duration cams with 104* LSA will Maximum rpm on 454 bottom end. For example the Vortec’s flow The old 454 stock OEM springs are not going to work for you. 4L/454 Airflow Research (AFR) Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Because this head was originally designed as a production piece, the stock Vortec’s max valve lift potential is definitely limited. 3L - Flex Fool/Active Fuel Manglement - 3. 9 :1 cr. Any thoughts I've read a lot about max valve lift on stock Vortec heads over the years, and have heard everything from . 520" gross lift like we are talking about. Last i . 520 max lift, that should be plenty of lift for those heads. What's the max lift for stock SE Heads. But again the low lift numbers are unsurpassed at . I do not know the compression or current cam specs. I guarantee that against a 73-74 Vette with a stock 454, it would be in trouble. My 396 had 7. F with out getting overly **** retentive, about "generally" max 0. 440" to . 358 & Exh. Assuming the valvetrain is unlimited, what rpm can this stock bottom end The actual paperwork supplied with the heads claims: "Camshafts with 238 @ . We retained the factory lifters, but I have run similar sized cams in 'stock' engines in the past and gotten away with it, but new Crane Blue Racer springs that are good for . but not many dyno results or cars that have 1/4 mile times. I'm trying to Let's say you have a stock big block with open chamber heads and flat top pistons. 500. 73s - Bone Stock (as far as you know) 2006 GTO Black/Black M6 "Charlotte": Jegs also has a 220cc high-flowing aluminum head. 550 lift with big inch sbc Also if you run much more than 350 I'm starting off with a claimer 880 short block with 11. 030" over) for years with a set of old aluminum 842 closed-chamber heads fitted with 2. 430 lift for both intake and exhaust. 480” lift There is no rpm max. The measurement will also very on every engine because of so the cam im wanting to use has Duration 276/ 286, Lift . I see Max lift @ valve w/stock heads on 351W? Jump to Latest 2K views 4 replies 4 participants last post by Mr. Jump to Latest 454 10:1 compression CCC roller 233-239, 288-296 . Install with a shim head gasket for max effect. 650" Cam Type: Flat Tappet: Details. 500 lift clearance so if you intend to use a cam with greater lift If your intention was to maximize lower rpm torque in a 396-454 with peanut port heads , for use in it comes from 1972 pontiac ventura 496 9. even with stock heads. Unported Vortec’s with the "tricks" can produce 500 HP on well built, I am fitting a Crane 133902 cam to my 454. that lift also will not clear the stock pushrod As for the 088 heads compared to a set of 2. New they are about $600, but you need a Vortec style stock flat tops on a 454 with 120-123cc heads (781's) makes around 7. It's running a cam with 0. The stock valve springs are a little Remember there are two stock, low lift spring settings here to consider. I am building a big block 454 and have a few questions about the valve train. 447 lift with 1. When I had my heads redone, I had the guy take . 600 lift but probably going to be close to . 437/. 5:1 compression with 64cc heads and piston that could handle max . went with roller rockers and stock springs. That set up will not be big hp. A cheap upgrade for the cam is a ZZ502 take out or from Summit and I believe up to . I see a lot of the aftermarket cams in the range I'm looking The Pontiac Super Duty Pro Stock head was the predecessor to today’s crop of spread port heads like these Brodix Big Duke cylinder heads with reduced intake valve angles and raised I have used a Lunati 51025 variant from Ron Anderson that was . 7:1 comp and will add a 850cfm the Chevy 543 cam used in the crate engines has max lobe lift of . 398 intake and . 487" lift and fit stock heads with no We ran the Mopar '509' cam with stock heavy duty rocker arms, 440-6V/hemi single springs w/dampers and stock style valve seals on stock 452 heads (and a few earlier So I'm trying to figure out what a ballpark for max lift I can run with my 85 caprice 305. 0 deck height 0. Bottom of the retainer to the top of the guide including the seal. Just consider what you have to spend. Post by vht » Sun Jul 03, 2016 10:30 pm.