Most manuals (whether for the vehicle or for the carburetor) will specify 5-7 psi of fuel pressure. Any less than that and the volume decreases to the point where it will starve for fuel; any higher pressure and you'll force the needle off of the seat, overcoming the float and flooding the carburetor.
Looks like you're off to your friendly neighbourhood auto parts store for a new pump.
Replace the pump (easy to do) and then see if the truck "dying problem" from the other thread improves any.
If it doesn't, you'll at least have eliminated one possible factor.
When chasing down problems of that sort, it's always best to try changing just one thing at a time. Otherwise, you won't know for sure what was causing the problem - if you're lucky enough to solve it in the first place!