I have two thermoquad carbs on the way. On is a 77 vintage for a 400BB/727. The second is an 84 360/727 according to the snippets of info scattered around the web.

Going by model year with the parts store none of the carter p/n's of course match anything their listing shows. For what little I can find there is 77 and earlier and 78 and later are the cutoff years for these carbs. Of course looking on a few sites listings they call out one p/n as covering everything... so WTH is it?

By picture most of these kits come with several different versions of the same gaskets to cover variations and both primary sizes so I wonder if it really matters ?

I'm at work right now so I dont have the carb #'s handy or I would share.