yeah . . . you'll need to do some internal engine work for 350 . . . i've tapped out my bolt ons except for cams and chip and dyno'd only 25.2 increase at the wheels . . . Trey's right . . . anywhere from 15-18% loss from crank to wheels . . . if you want 350 at the crank you'll probably need some head work, cams and a good tune . . . the cams will probably give it a good kick more than just bolt on . . . and so will the tune . . . but that's gonna cost $$ . . .