4412 Carb help

[9dodge]

Need some help guys.

Rules made me buy a new "approved" carb from our series tech guys. I guess this carb has some number stamped in it so you can't play with it or something like that. Anyway, I bolted this holley 4412 on after jstting it to what I had in my other carb, 4412 also, and it has a bad transition "stumble" from the idle circuit. I tried a new power valve, and blowing through all the air bleeds, but didn't help.

Any thoughts?

Thanks

[krash]

what acclerator pump are you using? which power valve are you using? what is your elevation?

[9dodge]

stock accel. pump, and can't change it (rules)
Power valve was a 4.5 and it didn't run right, so I switched it to a 6.5 and it still ran bad.
Elevation 800 ft

[krash]

i run an 85 power valve but i find that unless i have just the right amount of clearance tween the pump lever and actuator i get a nasty stumble and or stutter but i run up around 4000 feet and also run about 10 degrees of base timing.