Couple of things. I have one of those carbs, but its on a bigger engine, so you will have to bare with me.
Assuming you checked for vacuum leaks, and you obviously know your total timing, what is your idle timing at? Higher idle timing will drastically improve signal to the carb. I recommend 22-23° at idle if you can dial that in.
Two, #69 idle air bleeds and one turn out on the idle screws will get you more fuel. I run either #69 or #70 on all my Mopars....They like fuel at idle. Stock is #76....Too lean.
PS...That is the best performing carb I have ever had once I thru out all the jetting it came with and started over. I also went with out any power valves and square 94 jetting and got my idle better by 200rpm.....They say that means I have a vacuum leak, but I looked many times and could not find one. The car has gone 6.13 in the 1/8th geared for the 1/4 so far. I went with #28 HS bleeds from the #34's that it came with as well, but my engine is bigger...
Two people have made me multiple offers on that carb....Kinda weird cause I really don't want to sell it I picked up almost a full 1/10 in just the 60ft from a 1.40 to a 1.326 with mine.....deadly consistent.
Timing is locked out at 36*, I have checked for vacuum leaks and have none, I also have new carb gaskets and new nitrous plate and solenoids(Indutction Solutions sledgehammer plate) that were all sealed with liquid teflon sealer. I will check what my air bleeds are and let you know but I might try your suggestions after I get my wideband gauge on it.
