Scott,
Prince Chevrolet was located on State Highway 206 in Montgomery Township across from the Princeton Airport. It changed ownership in 1976 and became Princeton Chevrolet until the late 1980's when the owner ran into some criminal trouble and it went out of business. It remained vacant until the late 90's and then and is still known as the Range Rover Dealership.
If you need any more information call Ed Minier at Nassau Conover Ford on 206 in Montgomery. He worked there.
Hope this helps...........
Verne