We sold a bunch of these tanks back in the day & these are our last few in stock. Increase your gas capacity from the stock 15 gallons to 22 gallons! They use your original tank mounts and fuel level sending unit. The tank is designed for the filler system on 1976 & 1977 Jeep CJ's that used "Leaded Gas" it has a larger inlet fill spout that the later (1978-1986) CJ's. The tanks are the same otherwise, you would need to modify the filler hose to use it on the later model CJ's.