Jim, I'm sure someone has. The 4.0L piston has the same C/D as a 304, just the larger bore. Rick Jones here in our MI club, who will help build up my engine, suggested the 4.0L piston. I just can't run it with the 390 crank and rods due to the larger 390 1.001" pin bore in the rod and I don't want to bore my block out to the max, since one cylinder is sleeved. Greg :) <>< Jim Blair <carnuck@xxxxxxxxxxx> wrote: Didn't someone do the 304 with 4.0L piston buildup? --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080215/1f192b27/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list