I used an LMC roll pan, p/n 38-7322. In addition to lengthening the pan I modified the fenders by adding pieces to blend them into the roll pan. The roll pan is not designed to be located lined up with the fenders. It is designed to be fastened under the bed portion that sticks out past the fenders. I've always thought that looked dopey. If I were to do it over I would have purchased a Mar-K roll pan, made here in the USA. But at the time I wasn't aware of Mar-k. It just bugs me having Taiwan steel on my classic American truck.