How long ago was that. The garbage of the mid 80’s until the late 1990’s was straight junk.
Mallory put a severe dent in the fuel pump market because they made **** and when the power levels started to climb the Holley pump started to show its weaknesses ao you had to run two of them.
It was a **** show because Holley was diametrically opposed to using a return line. With the he,p of two friends I started using a return line in 1984.
I blocked off the bypass in the pump, and ran a Hilborn -8 check valve set at 6 psi. It worked but its flaw was when I started making close to 600 hp the check valve couldn’t keep up. So I switched to mechanical fuel injection which was one of the dumbest mistakes of my life.