I believe the "Enola Gay" is now in the Smithsonian. They did have "Bock's Car" on display in Dayton.
It was my first visit there. They had two huge display hangars with just about everything the USAF has ever flown. They were in construction of a third display hangar. They also had another indoor display area a short busride distance away in their "R&D" hangar. The coolest airplane in the "R&D" hangar was the sole surviving XB-70 Valkyrie.