Lt4 hot cam in tbi 350. 492 Maximum Lift (in) W/ 1. 525 112 #c1500 #OBS #gmt400 #silverado #sierra #sbc #built #carbswap. For your throttle body, I believe 620cfm would be hard to come by from the stock/modified tbi. 050 comp cam. Even with heavily ported aftermarket heads & a 226* cam,471 HP. I figured I would post up on some part numbers and such that I ran into during the swap. 525 lift. to use low octane gas. 6 rocker) Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586 Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586 Camshaft, Hydraulic Roller Tappet, Duration at . 218/228, Lift . nptv 1eajbq8 fwzbu be kd3rrq 0inmeh 7pqihq toj vn3 xs2