If you plan on upgrading to an Ali head later on I would go with the higher lift cam. The 7K3 heads will top out on flow around 0.450" lift so the extra lift will not get you anything. Also, you will need a longer valve and have to cut down the valve guides and maybe spring pockets on the 7K3 heads to accommodate the 0.592" lift. If you plan on staying with the 7K3 heads you can go with the lower lift cam and it will be easier.
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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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