Eddy heads on 416 stroker question

autoxcuda said

I thought the only difference is 63 vs 65 cc chamber size.

I thought all the assembled heads come with a little casting flash taken off the end runner near the gasket and some in the bowl.

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What then would be the compression ratio increase from 63 to 65? Worth talking about on a street cruiser? I know this car will probably need some slicks to go racing with, which I will probably never do anyway, but I would like it to respond when asked to.