A few years ago I bought a '75 gmc 1/2 ton longbox fleetside that has a wood floor. I had never seen this in a '73-up fleetside before. A lot of people say someone must have converted it to wood based on their experience of never seeing one before either. I believe it to be original. It looks original. A friend now owns the truck. His dad has been a bodyman for years & was surprised too. We have all made it a point to bring this truck's bed up in discussion with anyone & everyone. So far, NOBODY has ever seen one or can verify they existed.
Anyone know the scoop? was it an option?