Fueling & Injection - Too much fuel pressure???

I have a 94' Camaro that was originally a v6 that I converted to an LS1/A4 setup. The car has 243 heads, LS6 intake, LT's, 3in exhaust, 228r cam, cold air kit and a yank 3600ss. I had the car dynoed and it made 384rwhp. I thought this was a little low so i started checking things out to see what the problem could be. I ended up finding that i have 70lbs or pressure on the fuel rail at idle and it drops to 50lbs at WOT. The car obviously doesn't have a fuel regulator. What could this cause to happen performance wise??? I am looking at purchasing a corvette regulator.

You cannot run a car without a fuel regulator.... the pump is running against its internal bypass. Surprised it hasn't failed yet.

You already have a return line under the hood from the V6... just plumb a regulator under the hood into the factory return line.