Fuel Pressure at The Rails will Vette FFR

[AU Doc]

I just added a Holley fuel pressure sensor to my Holley Dominator EFI to help diagnose some issues with my engine. It turned out my (new) fuel filter regulator (FFR) had failed, and I was showing 109 psi at the rails.

I replaced the FFR, and first startup it was showing 68 psi or so at idle. I didn't have time to drive it, so I pretty much started it and shut it back off. I finally had a chance to start it up gain last night, and it's showing 71/72 psi at the rails. Is this normal, or is there something else going on with my setup? I would think if I'd plumbed it incorrectly (i.e., swapped the inlet and return on the FFR), I would not get any fuel to the rails, but maybe that's not correct.

Any help is much appreciated! After all the effort in doing this LS swap, I'd much rather be driving my car than sorting out all the gremlins I've run across