An original refurbished 1964 Corvette "Carter AFB" Carburetor. Numbers are "correct" (#3851761 / 3721SB) GM tag attached as well. Tested and it works very well. Carb can fit other GM 327ci 300hp engines; 62, 63, 64 etc. **Seller has additional used engine & drive train parts from recent 1962 Vette rebuild.**