At some point in Ground-Up’s sordid past, someone cut a section of the passenger-side rear wheel tub out and added some steel to make a super-narrow spare tire rack. We didn’t feel the tire holder, since our already narrow 33x10.50R15 BFG tires would not fit in the holder. We thought about dropping in an ammo can or a vintage steel tool box, but getting either to open easily with the cage there would have been difficult. Instead, we used some sheetmetal from a YJ wheel tub to fill the hole. Here we used a throatless shear to trim down the filler piece.