Well I haven't checked the direct fuel pressure because I don't have a fitting to get the gauge on the fuel filter and I can't find a rubber line to pinch off the return line.
But I did check the fuel pressure on top of the block. Its about 54 at start up and hovers around 50-53 at idle. When I shut off the truck it jumps to 60 and stays there for at least 15 minutes. I really expected a higher pressure than these readings.
I drove around with the gauge and at about 2000 rpm I get 54-56 psi, if I tromp the gas I can get about 59-60 but never higher and it won't stay at that pressure very long before it gets back down to 55-56. When I let off the gas pedal it drops to 50 then creeps up to about 52.