Thermoquad on a 73 400

[Barbotte]

Hello folks. As mentioned on the Introduction threads, I just inherited (purchased) a 73 Roadrunner project. Of course all of the parts came in different boxes with some extra pieces. One of these extra pieces are two thermoquads carburetors. Which one would have came with the 400 a/t. Carb "A" has 6-2124 printed on top and carb "B" has 6-2007 printed on top
Thanks in advance.

 

[Barbotte]

Found the proper numbers on the base plate. Carb A- 3321S, 08 2
Carb B- 6139 8, 193 1

 

[Barbotte]

Got it figured out. Misread carb A, it's 6321s which turns out to be for my 73 400 auto. The 6139 comes from a '72 340 auto. A little sleuthing online goes a long way.