68' 340 60 over,B1BA heads,str 12 w/ custom 1 inch spacer for top plate, cam motion roller 259/263 dur 684/684 110 lobe seperation 106 intake centerline. The holley are 650HP's. I went with the cro'd huges 1.6 roller rockers. their solid roller lifters also. Pistons are prob flat tops, final...