Based on my own experience, and judging from several different people I've conversed with, I'd personally avoid the 8N8050C "New, Not Marvel Schebler" reproduction carb. They don't seem to idle at low RPMs out of the box, and have problems with sudden changes in throttle position as well. You can take them apart and start experimenting on them, and make them work better, but they aren't "plug and play" by any means. They are appealingly cheap and have the patina of "new and free from problems", but anecdotally, at least, their "customer satisfaction rating" is pretty low. I think your best bet is a used original Marvel-Schebler. Rebuild it yourself, or buy one already rebuilt and guaranteed. "Chinese Copies", generally speaking, are weak on proper testing, R&D, and post-sales support. But they are cheap in this era of globalization. "Always the lowest prices. Always..."
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