Idle RPM with Air on.
 

Is there a kit or solenoid that i can use to increase the idle speed when i turn on my Air conditioning, car is carburated with a Vintage air system.

Quadra Jets use to have a selenoid on them
 

May want to go to a junk yard and look. I am sure you could fab something up pretty easy. Look at mid to late 70's chevys

You may also want to call Vintage Air and see if they sell anything