The Zl1 has already ran the ring..
Ford has not shown much enthusiasm with their new gt500 with an attempt to compete..
they tested the suspension, and aero last year there. they've got a gt5oo there right now.
the thing i note about the two..........chevy's guy is like your neighbors annoying chiwawa......making a LOT of noise all the time. fords guy is more of the "speak softly and carry a big stick" kind of guy.
both methods are good for keeping people hyped.