Quote:
Originally Posted by hatzie
Use the 305 cylinder heads on the 307 they have 1.84 intake valves 58cc combustion Chambers and hardened valve seats.
The increase in compression from the smaller combustion Chambers will be offset by the fact that you're still using the stock flat top pistons so you won't get a lot of detonation if any.
Use a 1ton quadrajet on a Edelbrock spreadbore performer Dual plane intake and use a vacuum advance hei distributor.
There are several good cams that should work well with that combo. It'll be a much better behaved truck engine than the 305.
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This is the recipe I had in mind if I do use my leftover 307 that has been here for 25 yrs, and install into my '85 C20. I have the smallest Voodoo cam for it too, 2 sets 305 heads. Would love to use the TBI swirlies and mill for 10.5 compression. This would be aimed toward mileage and what torque we can muster.