I think the shop is good. They've done a crapload of quadrajets and came highly recommended.
I know the carb needs the brass sleeves but he says it has other internal issues as well. He's going to send me pictures so I can see exactly what he's talking about.
I asked them to try to make this carb work. Finding another one might take awhile. Meanwhile, I'll be on the lookout for another quadrajet that matches my car.
Thanks for you comments and suggestions.