Check out an article that appeared in the August 25, 1962 issue of Amusement Business about a new dark ride designed and built by Kenneth G. Boyle of KD Enterprises in Sunnyvale, CA. According to this article, this was the first dark ride built using these new one-piece fiberglass cars. KD Enterprises is the company that supplied Tracy with the ride car that he called the Hush-Puppy.
The Bill Tracy Project 