bought a adjustable fuel pressure regulater what do i set it at.350,5.7tpi,superchip,no cat or smog,flomaster catback,airfoil,screens removed on m.a.s,accel upgrades.???????????? any suggestions

50-55 PSI

It depends on the enjector size and other factors. I'll say Everett's answer is as good as any. Typically you'll want to monitor your air fuel ratio and tweak the pressure to keep it properly mixed off idle and at part throttle. Fuel pressure and injector pulse width work hand in hand to control the mixture accross the full range of load and rpm.

I support Dave's answer. Here's your Bartle & James.......