I installed it on my 350 with a 750 Holley with a carburetor inlet pressure gauge. This is advertised as 4-7psi, it was originally 3psi and dropped to 2psi after about 4 hours of operation. I, too, had to stop every mile, fill up on my carbs, and drive back home. This pump is junk, holly, you're selling junk, even if it's made in the USA.
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