sumcollegekid

Hey guys,

In a separate post I was asking about my fuel pressure for my slightly modified 1969 390hp 427 (with the return line style fuel system).

I'm wondering if anyone has any "old school" specifications for all these different AC Delco/GM part numbers of fuel pumps; perhaps GPM or pressure specs. I'm interested in the following part numbers but if you have more info then even better!!

1968/1969 390-435hp - 40659
1968/1969 L-88 - 40482 and 40718

Thanks,
Sum

MelWff

Back of 1969 factory manual has one spec for all 427's, 5 to 8.5 PSI and 1 pint in 30 to 45 seconds. The 1983 parts book shows one number for all 427's 6426741 AC-Delco number 40482. The Chevrolet Power book from 1984 lists the performance pump as 6415748. I also found another pump 2001 GM Performance parts 12355614 7 PSI 100 gph.