I always adjust the center one first then get the front carb to wear I like it & then move it to the rear & then adjust the front one last again, makes it easier that way. I would also try that to see if your lean condition will now move towards the front of the engine along with the carb. The you know it's the carbs & not an intake issue.

1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.