just got me a '67 Barracuda

Have you done a valve adjustment? That seems most likely to me (although remanufactured carbs have a TERRIBLE track record. I made the mistake of buying a reman — car never ran right. Had it rebuilt locally by a reputable shop, and it ran 100% better.)

FYI, Slant Six Dan over on .org sells NEW 1bbls (not reman) for a very reasonable price.

I'd try adjusting the valves first, though.