I have dealt with this on 6bbl intakes.
Not going to be WOT fuel issue.
Idle/ part throttle and coasting.
Fuel puddling on floor and running in wet.
Small dam on runner floor fixed it for me.
Didn't effect WOT in my experience.

70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!