[72LT1AC]

I'm trying to chase down a contact for Frank Z/Sunniday Chevrolet in Highland Park. IL,
1. When did it close; 2: is there anyone to contact.
Someone posted that Rick Stratton was high performance sales specialist there and had moved on to Gary Lang Chevrolet; I contacted them and he has retired to FL but could not get any contact info.
I have a 72-LT-1 that was delivered there in March of 1972 and am trying to chase down as much data as possible.

Thanks