Quote:

You'd want to source a piston with ~1.687" CH & would likely need a substantial dish to keep the CR reasonable along with the proper dia of course 3.940 (.030 over 318)



i was thinking one of these might work http://www.ebay.com/itm/310379248080?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
or
http://www.ebay.com/itm/330843075483?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
i would think this would put it close to zero deck and with the closed chamber magnum heads maybe around 10-1?????