I would guess the fuel pressure regulator is that back against the firewall where the gauge is on the driver's side. Should be a vacuum line you can trace from there to the intake or spliced into another vacuum line.
Now I might be wrong from just glancing through the thread but if you can go key on, build pressure in the system and it stays according to that gauge then I would have to guess the regulator is ok and you don't have an injector just flat out leaking. Which to me would lead to an injector receiving a faulty signal to open and sticking that way or isn't pulsing correctly.
how long was it cranking before fuel came out the tailpipe? I'd hate for you to be chasing your tail on the fuel system when it's a lack of spark
Now I might be wrong from just glancing through the thread but if you can go key on, build pressure in the system and it stays according to that gauge then I would have to guess the regulator is ok and you don't have an injector just flat out leaking. Which to me would lead to an injector receiving a faulty signal to open and sticking that way or isn't pulsing correctly.
how long was it cranking before fuel came out the tailpipe? I'd hate for you to be chasing your tail on the fuel system when it's a lack of spark