Mike, the Wilcom family has owned the track the entire time. There are 4 brothers whose family has farmed the 5 square mile parcel of land for generations. They have run a diary operation that's pretty self sufficent. They are good people. They built the track in 1950 in a alfalfa field. Bill Wilcom has been the track manager the entire time after he got out of the service. He might have some info for you. He had to close down the track due to health reasons and has been able to beat it
When it was operating it was the oldest track in the state of Maryland.
I'll pm you his phone number. It's worth a call. He would have the photos from the past. Hope you can dig up some pics of your car from back in the day. If you do find some please post them here when you get a chance.
Good Luck~