I think you nailed it with 1976 Detroit Auto Show, at 1st glance I was not sure it was the old Cobo Hall as the distinctive chriss crossed flourecent lights are not visable, but I see they are just turned off and just the Emergency lights are on it the picture you posted. Thanks for posting and the info!
78 Sunbird Safari Wagon, 3.8 N/A, 1971 Catalina Freeway Enforcer
77 Astre Formula, some day soon powered by a 215 Buick V-8
1973 4-speed Lemans Safari STOCK!!!!! 1978 Catalina Safari
1971 Lemans Safari/GTO Clone, 1969 Firebird Sprint 301 ci OHC6, T-5, 4.10 12 bolt posi