My OBD1 setup runs at 52 psi and it runs fine. (I use a filter / regulator from a 2002 Jeep Cherokee, which has a 52 psi spec.) So yeah, I would agree - crank that pressure up and see what happens.
Mine didn't like more the 42 psi or so on OBD I, weird.
I adjusted the pressure up to 52 psi and it runs much better. I could tell a difference in idle quality while I was adjusting it. There's still some misfiring, but it's not as bad as before. I'll leave the fuel pressure where it is and change the injectors when I get them.