Hello
1972-1977 Jeep CJ (exact fit 1976-1977) 21 gallon tank. Will fit 1972-1975 but requires OEM style skid plate and straps. Does NOT come with skid plate. Includes skid plate extensions, new sending unit, new top strap, new lock ring and O-ring. Inline fuel filter is required.
I don't know what year you are working on but if older than 76 you need the 76 -77 skid plate. all they do is lower down the stock skid plate.
it looks like they left that detail out on the website.