Are the NOS fuel pumps different than the parts store ones? Occasionally I see NOS fuel pumps for sale but am skeptical about the condition of the diaphragm so I haven't gone for it.
My fuel pump isn't too eager so I replaced it with a NAPA pump, it was all I could find in stock locally. I've had pretty bad luck with Jeep parts from NAPA but I put it on and cranked and cranked, no fuel. Took the input line off, fuel flows easily. I hooked it up to my 'weak' fuel pump, pumped it three times by hand and fuel shot halfway across the driveway. That was weird. So I put it back on and am back to poor volume but at least it starts and runs. Fuel filter is new as well.
I know the easy thing would be convert to electric but I'd just rather not at this point.
Anyone else had issues with mechanical fuel pumps on V8's?