My 75 has a wooden floor, it's a fleetside longbed, There's a bedliner covering it up right now though because the inside of the bed wasn't painted to match the new paint of the truck when my grandfather had it painted. I can't wait to get another bed to use long enough to sandblast the current bed and put new wood in it... should look pretty sweet when it's finished. If you want a factory wooden bed, look at the 73-76s, more of them had wood than any other.