Drilling the throttle plates

You normally drill the secondaries about 1/8 hole on the backside, to keep the primaries on the idle circuits. You can also crack the secondaries by that little set screw on the bottom of the carb. There is a kit somewhere that you can install at the base of the carb stud that gives a jetted bleed of air, same as the holes but its adjustable.

OOPS, just saw it is an Edelbrock...disregard.