Not Ranked
The early competion cars (about 1963 prior to the FIA model) had what is known as Kidney Bean wheels. These were already in use on other race cars and were sourced from Halibrand. These are pictured on the car Dan Guerney drove at Daytona & Sebring in 1963. As the tire development moved forward (IE: considerably wider) and with the introduction of the FIA homologated car Shelby had the oppotunity & need for a wider wheel. Halibrand was chosen as the manufacturer. I believe the wheels were originally made of Magnesium for weight savings, but the required maintenence and safety issues has relegated them to be made of aluminum except in rare cases. I believe PS Engineering does or has made small runs of them in Magnesium.
The FIA car itself was a specific competion model and started life as such. One of the small item that was done to them was redundent electrical wiring to put the lights from each corner on their own circuit. In the event of collision damage it allowed all the remaining lights to operate independently. There were of course many other things done as well in the name of reliability and performance, this particular one was not visually appearant.
Considering the small number (6) of FIA cars produced they certainly hold a mystic.
Rick
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