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Old 01-21-2026, 08:49 PM
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What's the max lift your heads can accomodate?

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1967 Firechicken, 499", Edl heads, 262/[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.
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Old 01-21-2026, 09:01 PM
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What's the max lift your heads can accomodate?
im not sure.

If this is not the cam I need I will send it back,get another one or whatever it takes. I was told to get a B suffix and I thought thats what i was getting. Not much on line about a S suffix but it looks like for a small block chevy,,,extreme 4x4 family or something like that. Whatever that means.

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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86'
Last edited by scott70; 01-21-2026 at 09:46 PM.
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Old 01-24-2026, 02:27 AM
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What's the max lift your heads can accomodate?
The engine shop did check,,, they said they might have to take just a little off the valve guide so the retainer doesn’t hit the seals for a .577 lift but it will work. It had .530 lift with the previous hft and cleared. On the head flow #’s the exhaust had peak flow at .600 lift. The intake only showed to .550 lift. The cam I will be using has .580 on the intake, .575 on the exhaust using my 1.60 rockers.

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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86'
Last edited by scott70; 01-24-2026 at 02:32 AM.
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