Quote:
Originally Posted by F14CRAZY
Block will be ok...consider the Chevy 60 degree V6 (your 3100) was offered back then up to 3.4L, and now up to 3.9L. Plenty of material in there.
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That's like saying you can take an SBC with a 3.5" bore and open it up to 4.125", since thats the stock bore of a 400. Not true! IIRC some of the early 283's had enough meat cast in to comfortably bore to 4.000," but they quit casting them that way sometime in the 60's.
0.010" over shouldn't put it over the edge, but you can't just take a 3.1 block's 89MM bore and go 10MM over.