Tons of info here: Thermoquad guide
Manuals, kits, and other stuff here: Carb Dr.

The adjustable air door works great on a Thermoquad. I used the same carb on a 318, then on a 440, and it got me 14.20@98MPH with a junk yard motor in a '69 Coronet. Same car with the 318 and that carb was much slower, but never any bog or mixture problems.