1972 Plymouth 340 - 4 speed - 355 gear - Carburetor Suggestions

Man I don't know. Do an internet search for "Edelbrock 1407 problems" and you get thousands of hits. Even I have one I couldn't get right.
It's not quite an AVS2 but it works good. Definitely hit or miss depending on what engine it gets put on but I wouldn't turn a free one down. No way I'd buy one new at $400 or whatever they're asking