NEED ADVISE: Fuel Pressure

What should I have my fuel pressure at?
I have: Stock shortblock and cam, Edelbrock Performer Upper & Lower, GT-40 Iron heads, 75mm MAF, 24lb injectors, Paxton FMU - not sure on the calibration, Equal length shorties, Off road H pipe, 65mm T.B., F-150 Pulley.
It is making 8lbs of boost.

Is it the FMU that came with the kit?

If so I believe its 12:1. Set your pressure to 40 psi vaccuum off. If it seems a little rich you could take some out.

Ya, it's the FMU that came with the kit, but I'm not sure if the previous owner changed discs or anything.