Tom, I only knew of it in 1975-1981. After Northstar and Minnesota Dragways closed, it sat at a gas station on East River Rd around 85th Ave. It was still wearing it red, white and blue flag scheme at that time. I was married in 1981 and moved to the south end of Minneapolis 45 miles away and lost track of the car. I am unsure if that was the same car you saw.
Tell you mom and dad that the "investment" would/could have been your retirement now!