I bought it already built it has rpm alum heads ported,76mm maf,70mm tb,gt-40 tubed intake,30lb injectors,190lph feul pump,3:73 gear,fp regulator,comp cam 544 lift ,trw forged pistons,fluidyne radiator and 150 shot nos I can't even do a burnout its losing power bad ive heard it could be the o2...