I see, thanks for the info, my holley dp is an older model. I didnt know quickfuel made bases for them. When the throttle shaft gets too worn it just makes a vaccum leak right?
Yep. You can test by squirting some WD-40 on the shafts. You'll hear the engine pick up speed or drop revs depending on the present idle fuel mixture settings. A straight edge will show the whether the throttle body is warped or not.