Omix Poly Gas Tank 78-86 Jeep CJ ModelsOmix proudly offers all the parts you need to keep your Willys Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement poly fuel tank fits 78 83 CJ5, 78 86 CJ7 and 81 86 CJ8 models. The tank features a 15 gallon capacity, heavy duty polyethylene construction and a 1 inch inlet diameter. For fuel sending unit, use 17724. 07. For fuel filler hose, use 17740. 03. For fuel vent hose, use 17743.