proform race carb / Idle trouble

i encountered this lean idle in the 1968 AVS carb on the 340s and 440s. it comes from the EPA emission stds. on the carter and edelbrock carbs are easy to fix. a set of drills #61 to #80 is what you need. i have taken the idle jets out of holleys but is NOT easy. but only take out .001" at a time.