I have cpl sets used Hemi pistons.One set 12 Ross for 4.310 x 4.500 with +.125 rod 12.5: with wrist pins and buttons asking 550.00. Second set is Venola 4.310 x 4.500 with +.220 rod 12.5:1 compression with buttons asking 350.00. lso have two sets of tool steel wrist pins 1.094 x 3.100 90 each new asking 300.00 for 8 or 525.00 for 16