Anyway... I found the car on Craigslist, local to Grayson, Carter County, Kentucky. It came with original paperwork showing the dealer, date purchased and the owner's name so I eventually did some research online and managed to locate a photo of the dealership as it looked in the mid 70s. The owner was a local woman who probably received the car as a birthday or Christmas gift as suggested by some local residents on a social media genealogy forum who had worked at the dealership at the time and remember the car being sold (you gotta love small towns).
Call it karma, but knowing a little of the car's history just makes me a bit reluctant to part the car out. I guess I consider myself a caretaker of sorts. So, for now I'll continue to use it as a testbed (that's why I've named it Mr. Stein, short for Frankenstein) and work on the car's body as I learn metalwork and brush up and expand my brazing and welding skills.