I basically put that truck together for him and no disrespect greg. Im baffled on it only thing i can figure is heads or somthing is fubared. It should be making 50-60psi boost but 30 is it. Im told by previous owners its stock cam so i guess its never been out and isn't a tooth off?? I dunno but that engine isn't worth him payin me the labor to find out honestly. I will say i think my full on engine makes way more and broader power than a stock engine can but is custom everything. How much more i cant say but $5k in rods and pistons it should right haha