So I ask the question why would a guy want to take the time to find a TQ, in good condition? It has been 30 years since the Thermoquad was manufactured.
My dad runs a thermoquad on his 340 that runs like a champ, and I have one on my 318, they work very well, and are extremely tunable. I'll admit they can be a pain to find parts for, and work with, but I think its worth it.
To the OP, if you can find someone who knows how to work on a thermoquad, and rebuild them well, use it, they're good carbs.