Tommy, I agree totally to all. I too read the info on the Pump and read it is adjustable.
With a regulator I ASUME the pump is pumping maximum pressure. 14 lbs. +? If there is a regulator buried on this thing somewhere I haven't found it! (But I will look again today!) The pumps 'intake' is located just inches from the tank and about parallel with the top of the tank. The output of the tank is what I originally custom made; a 1/2" pickup 14"s long, running length wise in the tank. It then feeds out at the lowest section of the tank then 'UP" about a foot. The weight of the fuel alone should force fuel into the pump!
All information I have ever read says the fuel going into the carb should be 5.5lbs minimum. Motor doesn't miss or act like it is starved even under maximum hang on load!
Also so, being carbed; Holley-this is not a closed or a return type fuel injected system needing a return line.
Read: Out of Gas, the floats are fully down, opening up the jets in the carb,allowing air from the system to escape under pressure. In other words when the pump pumps fuel it will run along the line from the tank, to the filter then "through" the filter to the Carb. filling up the float cambers, eventually raising the floats high enough to shut of the flow, at which time the automatic by-pass in the pump takes over..... In other words NO air lock.! Hmmm????? Still thinking about this one!
DV
I think more info to come on this situation!