Tom (and others),
Do you recall Tom Peacock? I think he was an official at RA in the '60's. He was a mechanic for Frank Campbell in '58 and worked on his (and now my) Elva then. Contact info?
I knew Tom Peacock very well. He crewed for me a number of times, one of which was at the Nassau Trophy Races in 1962. As I recall, he was the SCCA Chicago Region Grid Marshall for many years. He also crewed for Ollie Schmidt, and was a good friend of Jim Scott who maintained Ollie's and my cars. He also was at RA when I last raced there in 1991.
I last talked to Tom some years ago shortly after he retired from his "day job". Unfortunately, his contact info was on an old computer, and I've lost it. He may have lived in Glenn Ellen, IL at the time. I did a white search and there are 8 Tom Peacocks in Illinois. The one in La Grange may be him.
Also try the Chicago Region's Office.