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#1
05-07-2003, 05:09 PM
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307 heads on a 30 over 350
I'm thinking of putting the stock iron heads from my '69 Nova's destroyed 307 on the new 350 replacement block. The new 350 block will be .030 over. Will the combustions chambers on the old 307 heads need to be re-worked to match the bigger diameter 350 30over cylinders? I already figured the heads will need to get redone anyway with new everything and probable have the deck surface machined flat.
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#2
05-07-2003, 07:00 PM
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As long as the CC of the cylinder heads and the pistons the 350 has will not conflict it will be no problem. It'll boost the compression ratio a bit but you need to make sure valve clearance isn't an issue. See alot of rebuilt 350's using 305 heads for better low end torque.
__________________
Shop Foreman Corvette Specialist A.S.E. Master Technician L1 Certified A.S.E. Master Machinist GM Certified Technician
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