As everyone already knows i am building a motor for boost...................anywhere from 8-12psi..............i am hooked on the dss short blocks i want a lever 20 331..........................and want to run it under 8-12 psi with a FTI blower cam (already have) and vortech blower(already have)...................but i cant decided betweem the 331 or 347 for boost which one would you guys pick and why?????????????????they seem to be very strong and with my dss windage tray and main girdle i wont have to worry about beating the pi$$ outta it either.............