Never dyno'd but pulled strong , stock crank 360 .030 over h beam rods with 0 deck kb 107s , home ported J heads 2.02/ 1.60 milled closed chamber .075 mopar .028 head gasket, hyd roller 242/248 @ .050 .600 lift 108 in @ 104.5, gasket matched m1 single plane 850 holley , 1/ 3/4 hooker headers, 3800 stall , Mud motor pulled strong to 6500na and 7000 with 125 No2 shot, very easy build and no piston to head prolems with over 500 passes about 50 on No2