Plans are to leave the entire sinkhole and the eight Corvettes on display through the end of August, and construction on the "revised" sinkhole would then begin in September, the museum said. The museum is celebrating its 20th anniversary with an event in late August.
Jason Swanson, a University of Kentucky assistant professor in hospitality management and tourism, said keeping some of the hole is a smart decision.
"It's definitely a good thing to maintain some of that attraction that happened, to continue to capitalize on that," he said by phone. "Putting the cars down there is a great idea. It lets people see some of the actual damage that can be done by nature."
No final decision has been made on how many of the cars will be repaired. Chevrolet stepped forward to oversee restoration efforts.
The cars that took the plunge were a 2001 Mallett Hammer Z06 Corvette, a 1962 black Corvette, a 1993 ZR-1 Spyder, a 1984 PPG Pace Car, a 1992 White 1 Millionth Corvette, a 2009 white 1.5 Millionth Corvette, a 2009 ZR1 Blue Devil and a 1993 Ruby Red 40th Anniversary Corvette.
The museum owned six of the cars, and the other two were on loan from General Motors.
Sinkholes are common in the Bowling Green area, located amid a large region of karst bedrock where many of Kentucky's largest and deepest caves run underground.
The museum is close to where Corvettes are made at a plant in Bowling Green. The museum is situated an hour north of Nashville, Tennessee, and less than two hours south of Louisville, Kentucky.