Fuel sprayed out of hood onto windshield....Help!!

....and close to 80 mph!! Took the Dart out on a country road about 5 miles from the house. Got on it in 2nd, spun too much, probably close to rev. limiter, peddled a little and got traction, up to about 6K, shift to 3rd. Immediately fuel started spraying all over the windshield from out of the cowl area of the hood. Shut the fuel pump off and pretty sure it died and I coasted to a stop. Ran out and got the hood off fearing I was going to burn the Dart to the ground. No leaks that I could see anywhere. Turned the pump on carefully, no leaks, pressure @ 6.5 psi. Started it back up with hood off, took a little cranking, like it was flooded. Decided to drive back home......slowly and made it OK.

I don't want to have this happen again!!!!!

Fuel system is...

Holley HP 750
Professional Products regulator set @ around 6.5 psi on inner fender of engine compartment, split to the inlets on the Holley. Not a bypass unit
Edlebrock 160 gpm electric pump which is factory set at 12 psi at the rear of the car.

My theory??

1. Fuel pressure is overcoming the floats and had all the excess coming out of the vent tubes. (Yes the air cleaner was off during this run, as I thought I was getting some restriction and was testing. Typically I always have it on.)

2. One of the floats\needle-seat stuck open, temporarily.

I would sincerely appreciate any thoughts and suggestions.

Thanks..........!!!