topcat,
I don't know the info on the numbers, but will say, I think the fuel pumps for the old 6's are pretty generic.
Here are a few 'no fuel' ideas; no fuel in the tank, debris plugging tank outlet, swollen and collapsed fuel hose, plugged fuel line, fuel pump on upside down, fuel pump actuator arm not on cam lobe, discharge line plugged, and last but not least....bad fuel pump.
Your post indicates the truck is running. Is there really a problem.
These may sound silly, but all have been reported at some time on this great site. Good luck.
Stuart
