flat top pistons,S&S 510 gear drive cams, t-heaDER , 157 MAIN 29.5 PILOT, NESS BIG SUCKER AC,( AND PUT IN GOOOD!!! CAM BEARINGS) AND YOU WILL SEE 98 TO 102 HP & 100-107 FT.LBS TORQE. Really........Mr.D.. P.S. torque will end at 3800-4000 & H.P. at 5200