fuel pressure dropping over time

I meant the electrical sending unit for the electric pressure gauge. But you said the mechanical gauge reads the same as the electric one in the car?

I'd maybe bypass the regulator all together if you have the fittings to try it out.
Gotcha, yes it reads consistently a few pounds higher then the mechanical gaugs, but that one is mounted on the fuel log, while the regulator (which houses the sending unit) is mounted on the fender


I did extend the harness a foot or two myself, if that matters

I do think I will swap in the deadhead, just to see what happens

But, I forgot the duster is going in for an alignment tomorrow, so we'll do that first