Trouble with a new Thermoquad Installation

Thanks for all of the suggestions. I adjusted the pumpshot, put in a new power valve, put in a couple of new size jets, etc. on the Holley and it did not solve the problem. I did however get the thermoquad to work properly. Here's how.

After fooling around with many thicknesses of carb spacers and gaskets I settled on 2 of the standard Mr. Gasket gaskets combined with 2 of the Thermoquad gaskets that you can get on ebay which are about 3/8" thick. They work very well with either the electric chokes you can get for a Thermoquad of the standard thermostatic chokes. The carb now starts when cold and after a couple of minutes to warm up it drives very well.

I did have to loosen up the fast idle control lever which was tightened way to much so it did not move. I also had to bend the fast idle connector rod a little to shorten it about 1/4". This allowed the fast idle control lever to move so that the fast idle speed screw was engaged when the engine was cold and the curb idle speed screw would be engaged when the engine was warm.

I also bent the choke connector rod which adjusts the position of the choke valve so that it is closed when the engine is closed and open when the engine is warm. The choke connector rod was too long on the carb I got from ebay and I modeled the length after a Thermoquad my son got from a friend that was formerly on a Barracuda with a 383. The length I set was 2 3/16" center to center of the rod ends.

Once I got a service manual with information on a Thermoquad in it the process was easier as the jargon was explained, but there was a lot of trial and error. I got one from rockauto.com for a 1973 Challenger.