It was sold, was brand new rebuilt but had 1 74lb and 1 80lb injector anyway.
Injectors are probably best but $50 to 100 a set plus a service. Adjustable regulator home made cheap install a TPI pump which bolts right in, looks identical. AC delco or Carter $75 to $100 plus putting it in the tank. If yours has never been replaced it's a good thing.
Or both? You may find your old pump just ran out of poop...
You can drive and get it tuned for low end, but DO NOT go WOT high RPM! There's not enough fuel...