Thermoquad idle issue

Just asking here. What do T quads like for fuel pressure? Just got a buddies 440 dialed in. It came off the dyno which should be more plug and play than it was. The mechanical fuel pump put out 8# at idle and the Edelbrock didn't like it. It was eye burning rich. A regulator set to 4# did the trick.
Mine was OK with what the HO pump P4007040 put out. I think it was 7 or 8 psi. My Holleys were ok with that too. And the AVS/AFBs too. I run that pump on everything.