proform race carb / Idle trouble

Have you pin gauged the ifr to determine what size they are? If you have to really step down on your IAB to get it in range, I wonder if the IFR is REALLY small. If the IFR isn't at least around .030, they are too small.

Mcmaster-carr for some brass set screws 6-32 por 10-32, and a 61-80 and 1-60 drill set and you can do a bunch rather inexpensive without buying those kits.