Thermoquad idling issues

At this point I think I am going to shelve this particular reman carb. My dad has collected lots of mopar parts over the years and he has never ran a Thermoquad. He has always been a Holley guy. I found a few Thermoquads he has stored for years. I found a 4972s that looks quite different from what I have. Also a 6139s, which looks like it has been remaned before. The shafts are bare metal with no teflon coating. Also a 6322s, which is the nicest. Looks untouched with teflon coating on the shafts. Also found a new thermoquad strip kit. The 6139s and 6322s both have a little play in the primary shafts. Not sure if it will matter much. Which of these thermoquads would suit my engine the best?

So you have a 4972 TQ for a 71 340 manual transmission. That is worth only $500-1,000. That is what I ran on my favorite 273, it would be the last I'd ever sell. The 6139 TQ is a 1972 340 automatic transmission carb, I've run this one also on a number of small blocks, one of the best. The 6322 is a 1973 440 Automatic transmission carb rated about 850 cfm, very nice carb and sounds like untouched, the best condition. What a great bunch of choices. I run brass floats, I guess because of rebuilding Quadra-Jets. They would always soak up fuel. Never had a problem with brass floats.