Hey Pat,

Correct me if Im incorrect but the orginal post stated "Flat top" 496. I assumed flat top he meant flat top pistons...Now I may be wrong but if you use flat top pistons in a 781 head (119 cc oval) or 049 head (121-122 cc oval) I think he will be lookin gat some low compression. Maybe Im wrong but I think with either of those large cc oval heads he is gonna need a domed piston to get in that 9.5-10 :1 compression range.