The fenders for a 1 ton panel will not fit my 1 1/2 ton dually pickup. The fenders for the dually panel and pickup have mounting holes on the top of the fender. The one tons mount through a flange on the side. Spanky also told me that the rear fenders of Holmes wrecker bodies on Chevy's from I think '37-'55 are the same. Excellent find though! Thanks