#31

05-25-2026, 01:11 PM

Ultimate Warrior

Join Date: Feb 2000

Location: NH

Posts: 3,561

Quote:

Originally Posted by 73ta

600hp 494" RA manifolds won't flow enough for that engine IMHO.

I agree, 600 hp with headers and I know I'll be killing hp with the RA manifolds. That's why I am struggling with the decision. I'll either use a TII or an RPM intake and dyno the motor with headers first and then with manifolds and then make my decision.

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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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