Bret , you are correct technically, Ford has not made one in 40 years . But GT40 clone cars are still being produced today and are referred to as "super cars" . Are you saying that you cant race clones or that there is a cut off date on production ?
As far as Super cars go I might have a few that qualify . In my garage I have a 2012 B7 Alpina Bi Turbo 586 hp with chip and tuning , 2002 Jaguar XJR 100 (Anniversary edition) upgrade supercharged ,tuning chip and race suspension , 2002 Lingenfelter Supercharged Z06 corvette , roll cage , line lock , rear hard shafts , 411 gears and drag tuned suspension , 2007 stock Z06
I also have a Gen3 LS motor just laying around that will run 5.70's in a 3250 corvette if needed . UMMM !!!
http://www.gt40spf.com/gt40-specifications.aspx
http://www.superformance.com/gt40.aspx
!