On page 4 of that H-O newsletter, it mentions Glen Tinsley & his SS/KA '73 T/A. I know that, for a time, he was hooked up with John Clegg & his Pontiac racers.
http://missiongarage.com/photogaller...t-nov-1977.pdf
So, who has more info about Glen & his racing career.
I may have already posted these pics. But, a quick search did not show 'em. In the 2nd pic, looks like he was hard on the brakes. If you look close, you can see Tinsley & Osteen on the rear. I assume that Osteen was James Osteen. James worked for Gay Pontiac for 30 + years. He is said to have built most all the cars & engines raced under the Gay Pontiac name. I've read that he was also crew chief on the cars. So, I assume he went to most of the races, with the cars. Don't know if he ever drove any of the cars, or not. I think Gay Pontiac may have quit racing, by the time Glen was racing either of these cars.
https://efregoso.github.io/gassermad.../gay/index.htm