71 Chevelle 2 door 454 Wagon info needed

[71SSNova]

My brother has found a 71 Chevelle wagon that was supposedly a project at GM to see how they would sell and is looking for info on it. Any engineeers from the Arlington, Texas plant in 1971 would be nice.
The previous owner has some paperwork that we have not seen yet but is suppose to be about the car. I have no idea if it is handwritten, GM letterhead or what, so I can not say much for it.
Supposedly, 6 of these wagons were made as delivery wagons. 2 door, All Chevelle SS goodies, including buckets, console, gauge package, stripes, posi 12 bolt 410 rear with sway bar, cowl induction hood and a 454. 2 were crushed and the other four made it out the door. Previous owner states he bought the car from someone close to the engineer that got this one out of the factory.
Anyone have any info to back up this.
We both have seen this wagon but the owner was not around to pop the hood. It is a 2 door and if someone other than GM built it, they did a heck of a job.
Thanks, Dan