That's the aftermarket parts-store Marvel Scheibler carb. Real simple, runs and idles surprisingly well. You have the all-important irreplaceable choke driver, usually broken or missing. You also have the filter inlet fitting. Filthy but nice. You can get a gasket set, nothing more. I have a bucket full of them, I won't insult you by telling you what I paid each, but it wouldn't buy you dinner.