340 Pistons with 10.5 CR with X Heads???

The 2316s will get you 10.5:1 w 65cc heads and a fel pro .039 head gasket. These are what I usually use. They are not light though.

Yeah I ahve seen a few of these TRW 2316s floating around the FABO For Sale ads. Seem like they might work. But I have 72cc heads so I would need to do a little milling thinner head gasket ect. I would really like a piston at 10.5-1 comp without any milling. Then I can adjust gasket thickness and cam to get my dynamic comp ratio in that danger zone area of 8.4-1.