Very hard to say but it Looks as if a pickup bed has been grafted on, in a unibody type configuration like the unibody ford of the 60's or an El Camino look. It also looks as if a back of a pickup might have been used to form the back of the cab. I am not for sure, but that's what it looks like.
I have no written proof of this being one of the trucks (except that the serial and body numbers are just a day or two apart from the Hot Rod Network or the Posie truck) and was wondering what are the odds of that! there are dozens of other things that points towards that it could be!
I am going to write a list of all the things that points towards it being one of the trucks.
I have also talked to Gary who owns the Posie truck and he is suppose to share with me his documentation and where he got his information. He has already been kind enough to share the numbers off his truck. I was really surprised and happy to get this information and will post the rest of the information soon.
I also realize that there will be some people that will deny that it could be the truck. I owned the 1973 Bill Mitchell Trans Am that was the first Black and Gold trans am and had many documents to proof it along with the designer John Sinellas signature and it had been in many magazines and most Pontiac books, but there were people high up in the Pontiac club that wouldn't believe it, But it was and it sold at mecum auction for $145,000.00
You can't please everyone