How much of a difference is there between 9-5 Pistons? My 9-5 lpt winter beater is getting ready to let one fly through the block I am pretty sure, and I have my old 9-5 aero block kicking around from when I did the B234 swap on my aero. So I was wondering if I could snag a piston out of the old aero block and just through it into this block so it's quiet again. I figure it will probably screw up the compression, but as long as it gets me through this winter I don't care because it's turning into a parts car this spring....unless it actually runs ok after this. Any info would be much appreciated.