Found this......hope it helps....
http://www.carb-x.com/domestic-carburetors/chrysler/8-cylinder-engine/360ci/carter-carburetors/4-barrel-carbs/42-782
I have an NOS (still in MOPAR box) 6545 TQ, Chrysler part #3751472, but it's for 74-77 440, so don't think it would work for you.
Lastly...
I've used the stock 1970 340 intake w/ AVS carb as well as the stock 1972 340 intake with ThermoQuad on my 318. Both worked just great.....although the TQ got considerably better fuel economy than the AVS. Keep in mind though, that there will be differences mating carb linkage, automatic...
There's an earlier post on this forum where they were able to get one from Central Jersey Motor Parts. Here's a link to that post....
Heater control valve
If you have a part number, you can check it against Central Jersey's inventory list on their website. Here's a link to that...