looking for bio on Don Grotheer

In 1970 my mom took 11-year-old me to the Don Grotheer Plymouth Performance Clinic at a St. Louis-area dealer. They had a raffle for a Stewart Warner tach. Guess who won it? I walked sheepishly up to the podium while all the guys in the audience laughed. One of them bought the tach off me for like 30 bucks. I thought I had won the lottery! I still have the clinic booklet.

KosmicKuda if you can scan and post that article, it would be much appreciated.