[LMH]

Actually, the V8 was fit at AC Cars Ltd. AC engineers worked out the changes for fitment and I believe (not 100% sure though) that car was first test driven in England.
Also, Shelby was responsible for the concept of the V8 car but not it's design. Just an FYI for clarification.
As far as the 63 Le Mans race, I'm not 100% sure about the status of 2142 raced by Hugus/Jopp. It went DNF about half way through. Race results record it as Hugus Cobra but not Shelby American where as the AC Cobra raced was under AC Cars Ltd. I'm not exactly sure if SA wasn't quite ready as a team or exactly what was going on with the American entry, as far as SA was concerned. Never actually researched it that far.
Larry