Best Mechanical Fuel Pump

71Duster, I run the same FBO pump that you are running and I had the same problem, but not quite as bad. After a hard blast on the loud pedal the car would die when I came to a stop, the difference is that mine would start.

I could see the rear bowl on my Holley was overfilling (clear site plugs are great). I would adjust the float, test drive it, all would appear fine and it would do it again. I pulled the rear needle and cleaned it thinking it was small pieces of junk causing the problem.

Finally, I got it adjusted so the fuel stays just at the bottom of the site plug hole. It is definitively a trial and error deal, and to get it right you must flush new fuel into the rear bowl (mash the loud peddle). Mine has worked fine now for more than 600 miles.