The metering rods are down during idle as far as I can tell and I took a look down the carburetor while it was running and gas was pouring out of the boosters so definitely either the needle and seat or fuel pressure. . Im going to pick up a regulator tomorrow and try that next.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi