holley 1920 ideling too high

Dude, did You get rid of the binding? Is this the case w/the linkages disconnected as^^^^? Unless the linkages are totally free throughout their entire travel, and the
adjustment doesn't bind at the pedal i.e. pedal pivot, etc.... then that would need to be corrected 1st.
Second, how do the throttles compare visually both off the screws w/the linkage off? There is a chance the throttle You had apart is not centered in the body, and is
not closing completely? Besides the fuels ability to leak out of the shaft, is there play & poss. vacuum leakage a well? If I remember the throttle blades have a small
hole drilled in them, acceptable when using 1 carb, but You may have to close them up using 2 w/a small cam.