Fitting a Holley can be somewhat of a pain, as I've been finding out here lately. I found out trying to get the throttle cable fit to the one I'm running now that none of the available holes in the carb throttle arm were the same distance from the throttle shaft as the one on my QJet. This matters because this distance in conjunction with the amount of travel available on the cable is what determines things like pedal position and also whether or not you have enough travel to move from idle all the way to full throttle. I wound up taking this measurement off my QJet and then using it to drill a new hole in the throttle arm on the Holley that was the same distance from the throttle shaft center line. That took care of my problem.