GMC panel -it's a 53 chevy i have in progress. i'm useing a 49 to part on it has the the multi-piece floors i looked real hard at that but the wood is only 3/4" at best.I don't think that with todays quality of board, it would be stong . my plan is to go close to orginal with this one.i jump over and ask the mar-k guy in the bed section