The fuel pump question comes up a lot. The question is, why can't I get a rebuilt original fuel pump? The next question is why do FLAPS and other retailers have the "wrong" pumps in stock?
I think the supply of rebuildable old original style pumps are now "poof". The rebuilding plants of the 50', 60's and later are now "poof". It costs more to rebuild severely metal fatigued old pumps than make new ones. A.C. Delco built new replacements (some steel body parts rather than cast and inlets/outlets changed position etc.). The A.C. replacements are now probably used up and now we have to deal with clone pumps. The history of the pump has changed so much and the clone manufacturers are not striving to make a 100% perfect fit. The automotive world is now EFI and electrical fuel pumps. Next generation is EV. Mechanical fuel pumps and carburetors sales don't generate enough profit.
What we need to know: *) Is the pump arm correct? *) Does it bolt to the block correctly? *) Does it have the correct PSI? *) Is it built for Ethanol gasoline? *) Other things I can't think of right now.
The AD truck was built for a generation of people who worked and repaired things themselves. Problems with the inlet and outlet fuel connections would quickly be overcome.
Attached is some info from previous discussions. It could be Stovebolt. Sorry I can't remember.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
