I agree with dustermike, I will be ordering parts for this same set up soon and if you are keeping the magnum stock I believe you will want approx 48 psi +/- 2 psi The corvette regulator as far as I can tell is a non adjustable 58 psi. Tanks Inc, sells a adjustable regulator for approx $85.00, it will allow you to reduce to the correct pressure and add a short return line back to the tanks inc tank. You can also get a 20 micron filter from tanks inc too.
