throttle not closing all the way

Do you have the proper Mopar bracket on the throttle arm, and is your return spring anchored properly on both ends? I have seen that happen on installs where the spring is not anchored up front, and the throttle end is on a non-Mopar arm.
Have also seen it happen if the accelerator pump adjust was too-tight,or the secondary link had no clearance,or if the throttle was too far closed due to too much timing.

And also when a 2bbl bracket is used and the cable clamped in the wrong spot