Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

Carnut68 said

I said OLD holley blue pump. Mine is 30 yrs old works just fine. Keep a rebuild kit just in case. If you want to donate one of those Mallory 250s, I wouldn't object.
Just ran 10.66 with junk blue pump.

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That's why I was asking early on in my early post. I had one used one that was doing the same thing as a brand new one was doing. Even after I put a 19 lb spring in the new one and deadheaded the regulator. I could only get about 11 lb max and it took about 45 to 50 seconds to get to that