I was reading "Shelby Cars in Detail" and came upon this. 2136,2137,2138 were prepped for Le Mans in 63. One of the changes was larger side vents. 2137 did not run at Le Mans, but the other two did. I think the car LMH posted early on could well be either 2136, or 2138 - one of them went to A.C.
FIA
![](http://www.sportscardigest.com/wp-content/uploads/No.-33-FIA-Hillclimb-1964.jpg)