I am approaching 40 years of owning my Charger and I have researched the dealership over the years with little results. But, I did come up with some old pics of the dealership bldg even before it a Dodge dealer.
It was located in Lindenhurst, NY (Long Island) dealer # 53866. Mac Tun Motors (aka: Lindenhurst Dodge)

This is a collage of 3 pics….the bldg back in 20’s as Oak Garage (Nash dealer), then 50’s as Dodge/Plymouth, and finally in 1990’s with my car in front, after it became Island Chrysler/Jeep. Unfortunately, they knocked the whole bldg down and built a bank in its place. Ughh