Interesting footnote to the Hemmings article, there were 2 proto-types, and both were sold new in Columbus. Len Inmke, who started the Arthritis Foundation show here, collected Buicks the way that Bob McDorman collected Chevy's. He bought both cars for his collection, and they both got sold when he was out of town. Needless to say, he was more than slightly peeved.
The rest is car history.
Andy