In my opinion....the 427 Cobra would have come out on top......provided that the motor stayed together, and there were no other problems with the car.
Going off memory, I thought the Grand Sports did quite well over the 289 Cobra's, till the FE was placed into the Cobra. And the Coupe ate the Ferrari for lunch, so it's just a logigal deduction. Now if you watch some of the Historic races....seems as if it's always a 289 Cobra, 427 Cobra, or the Coupe taking 1st place in their group. Go figure......they are great cars! I'll take 1-each.
- Bill -