[Marc A]

I've heard that these 302/5L engines don't like going out that far, oil and water temp issues. Anyone else know about this?
Thanks
Marc A

 

[Wade Chamberlain]

most builders won't go over .030 on a 302.

 

[Robert Duncan]

Unless it's a "special" block, like an A4, R302, or 351 Sportsman, .040" over is risky.

You could get an ultrasonic scan to select a block that would go that far, but with that expense you might as well buy a special block.

 

[Steve]

You could also look into using hardblock filler and partially fill the block. That should add enough reinforcement strength and still allow for proper cooling on the street.