Thermoquad low-speed fuel well not filling?

Most excellent, Bewy! Thanks for all the good info. I don't have any problem assembling and disassembling my TQs because I have 4 old Mopars (LAs and RBs) that have TQs, and they're the only smog-legal carburetor for these vehicles, so I've taken them apart quite a few times but still not sure that I really know what I'm doing.

I'll try reassembling the 6461 after I've poked out the IFRs and installed some new fuel-resistant O-rings. Maybe that will help. Thanks again for your kind reply.