Remanufactured carbs any good?

It can be a crap shoot.

That's the honest truth. I've been rebuilding carbs for over 25 yrs. and you wouldn't believe the crappy rebuild jobs I've seen come from some of the rebuilder houses. I swear they disassemble 100 carbs at a time and throw all the parts in a huge parts washer and take it out and put whatever fits where it will. I've seen carbs come with different size jets from side to side. One 2 barrel Holley I worked on once that came from a rebuilder house had jets that were 4 sizes different from side to side. But if that's all you can find and they have a good warranty it might be worth a try. For me it'd have to be the last resort.