How much can be taken off a 250 block? I need to take off about .045 to get to zero with the 250 KB piston. Can this be done safely? This would yeild me about 9.01:1
If I use the 307 piston the deck needs to be cut about .030 to get to zero but the compression would be 9.29:1 which I'm kind of worried about.
Do you think I can open the chambers 3cc to bring down the compression? If I can open the chambers 3cc that would bring me back to 9.01:1
Any suggestions on which way to go?

thanks vince