a 370 long rod is just a long rod crank with 80 over pistons n it... u dont have 2 have a long rod 2 make 370cc's its all n the bore... so if ur lookin at a 4mm stoker with 66mm pistons it would b 397cc's, whether u have a long rod or not... also the crown of a blaster piston is different than a banshee piston... so if u run blaster pistons the domes need 2 b setup 4 them... hope this helps... L8r d34