holley 4 barrel flooding

hey guys

so i changed over my fuel system today and i ended up having the car towed home

it is a 71 duster with a 408 in it
it was a 5/16 dead end fuel system, set to 6 PSI

i installed a 3/8 fuel sending unit and used the 5/16 line as a return

the carburetor is a quick fuel 4 barrel, basic holley design

i put about 25 miles on it and then i came to a stop, stalled out and died

after several minutes, of trying to start it again (to no avail) i pulled the air filter and saw this




now, i KNOW a ton of crud came out the lines and so it would not surprise me if something got in the needle seat but that is a LOT of fuel dripping

in fact, enough fuel for me to change the oil before i attempt to fire it back up again

here are my questions for you guys...do you think crud is the most likely culprit or should i look elsewhere?

do you think i need to lower the float level?
(the fuel pressure is still set at 6)

do i need to pull the plugs and spray some oil in the cylinders?

anything else i could be overlooking?

thanks