OK SUPER LOW BUCK DEAL. basically stock '76 400, runs well, doesn't smoke but low on power. I want to do nothing more than swap out the low compression pistons for some KB240 ones, I do not want to do this if it needs to be bored oversize, I do not want to do any thing other than bump the compression.

QUESTION....when the heads come off, with a dial/bore gauge what is the maximum the cylinders can be to use standard bore pistons /rings???

If it has too much wear and needs to be bored, I will not take it apart father and it will go right back together.

If I can go the route of new pistons, I will mill the heads and deck the block only minimal to clean-up the surfaces, and be able to use fel-pro composite gaskets and gain cc's