When Ford tried to bring the GT40 to the road with its Mk III, it failed miserably: Just seven cars were made, and Ford couldn’t even sell all of those.
I seem to recall a silver or gray MKIII that had right hand drive featured in a 'photo ad' which showed a young lady wearing a full length dress who supposedly was about to get into the car on the 'passenger' (left) side.
That gave rise to me believing, until I saw the photo of the MKIII in the above article, that all the MKIIIs were right hand drive 'same as the race versions.
Live and learn!
Larry I got some of my info from Ronnie Spains "GT40"
GT40 M3 /1101 LHD PROTOTYPE GT40 M3/1106 LHD
GT40 M3 /1102 RHD PROTOTYPE GT40 M3/1107 LHD
GT40 M3 /1103 RHD
GT40 M3 /1104 LHD
GT40 M3 /1105 LHD