hi im building a 4.6 stroked to 5.0 and its all forged, ported heads, ported chambers, with ferrea valves, ARP studs,comp cams 270 camshafts, 60 pounds injectors, aeromotive complete fuel system (dual pump), long tube headders(hooker), 2.5 complete catback, with a vortech T trim i what to boost on that engine like 20 or 22 pounds the cuestion is wich head gaskets can i use for that? and what torque for those studs?