Not A T',
"actual" cfm on/thru a 383 cube motor (changes some but not alot with cam/etc)....
I agree, time to try just the center carb...with 48* cruisin...for higher Hg
at 13Hg, a carb is at the borderline for the gas not atomized by enough velocity, not suspended in the air for a good mix...
you will gain ALOT of velocity using only the center carb