This says the chassis is built by Chevy (doubt it)....
Corvette Daytona Prototype - Wikipedia, the free encyclopedia
This says....
2012 Chevrolet Corvette Daytona Prototype unveiled
"The 2012 Corvette Daytona Prototype was developed by a multifaceted effort involving Chevrolet, Corvette designers, Pratt & Miller and Grand-Am. Chevrolet also worked closely with chassis builders Riley, Coyote and Dallara," said Mark Kent, General Motors Racing Director, in a statement.