Re: Tricked-out Chevy six cylinder engines
The trick is on the inside. I had it bored over .040 and about .005 to .007 off of the top of the block to clean it up - rusty and about .020 off of the head for the same reason. I ported and polished the head installing a COMP Cam similar to the Mercury Marine cam. finally I used 307 pistons and they are flat top not dished like the 250s are.
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