John Ditmar/Diamond D - request for info   

Guys, I'm looking for some help regarding the career of John Ditmar, driver of the Diamond D coupe. I know he was voted Most Popular Limited Sportsman Driver at Harmony in 1966. Did he ever also race in the modified division? What years did he race? I recall seeing him at Harmony, and know he raced at Flemington. Perhaps also Nazareth, Middletown? Also in 1966 at Harmony, a Judy Ditmar won the powder puff race held that year - perhaps his wife? Thanks for any information you can provide, truly appreciated.