this is a model 4150, part number 0-4778 700 cfm double pumper. i received this carb with a car i had purchased,the guy really didnt know what he was doing,and was just throwing parts at it. i ended up putting the other carb he gave me with the car back on it,and am now selling this one. according to the guy i bought it from,and obviously by looking at it, this carb is very near new. i bought the car with it not running. there was wiring issues with the msd box,as well as plug wires ran wrong. i HAVE NOT cleaned this carb,and you can see how "clean" it is. i have also not tested it either. i figured it ran with the other carb on,and it was a used carb,so i would sell that one with the car,and sell this carb sepearatly. i am more into fuel injection,and thus dont need it. im open to offers,there was one pretty much identical on ebay this week that went for over $200. new price was $389 out of summit so make offer.i can take other pics if you would like,just let me know of what. thanks