I have the same carb.
It sounds to me like you have a stuck float in one of the two bowls.
If that's the case, you can try to tap on the bowls lightly with a wrench and hopefully it'll become un-stuck.
Or you'll have to remove the bowls and do a visual inspection and correct. Even though your carb is brand new, I find it best to have some new bowl gaskets on hand, as they sometimes tear when the bowl is pulled off the carb. And when you remove the bowls you need to be very careful that the needles are re-installed correctly.
86 CJ-7, 360, Holley Avenger, T-18, Dana 20, 4" suspension,