NOT SURE WHAT BRAND FUEL PUMP YOU ARE USING-—
I USE CARTER & I GET THEM FROM SUMMIT RACING PARTS.
THEY HAVE NEVER LET ME DOWN-—
I DRIVE 1976 1 ton 454 Chevy 4 speed & 1979 Buick wagon.
Well, that explains it...
We need to go back to pre-EFI engines.
Actually, I wonder why someone isn’t selling a conversion that would have a mechanical fuel pump providing fuel to an EFI engine. Maybe someone does and I simply haven’t heard about it.
Have you checked out this guy?
https://m.youtube.com/watch?v=4oYzQRZEdQQ&pp=ygUOdGh1bmRlcmhlYWQyODk%3D
If I ever again own a carburated vehicle, I intend on setting it up like that guy does.