What size carb ?

388dart said
Rumblefish360
Did you have an external fuel pressure guage that you could see what the pressure was at the strip? Was it the original routed 5/16 line with the ±9 -90* bends in it? Did you still have the original 5/16 size pickup w/sock in the fuel tank?

I picked up a Summitt racing adjustable regulator (Rebuilt Holley) but never adjusted anything on it. The guage, a summitt racing part was bolted to the AFB directly to the carb. I only reved the engine in the driveway to see how high it would go. It never crested 7 psi IIRC. I could have used the MoPar unit or equal to see whats going on from the seat.
The pick up was stock, w sock and 5/16 and so was the line up to the pump. After the pump it was 3/8's.

Current set up, I upgraded the pick up and lines to 3/8. I did this when I got the create short block and RPM heads and intake.
(248 @ .050 cam and zero deck piston on the RPM heads 63cc chamber and .039 gaskets.)