Questions re LS6

[Sportyworty]

Ok I have been speaking to an old guy with a substantial collection of cars and parts he wants to liquidate. I can handle the Ford stuff as he has some Cammer SOHC engine 428 CJ etc. He also says he has an LS6 car that was an engineering car for AC Delco Division. He says it was a late build 70 and that it has a fiberglas fuel tank and some LS7 engine components. I have no clue if this is one of those "stories" or if you guys feel there may be some merit to the story. He did give me the vin of the car and was thinking GM of Canada may be able to verify the car. His Ford stories are checking out including the Long Nose SOHC Mustang and Lightweight Galaxie. I will share the vin but would like some sincere advise if that would be prudent on the forum or best via PM
Thanks
Kerry