Are you using new pistons, or the original ones that were in the cylinder? A .012" oversize piston isn't going to work at all. I'd suggest turning the pistons down to about a .002" clearance in the cylinder bore.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!