Love the sound of this car and of course its breathtaking looks. Gotta ask, is that a cigarette lighter (just right of the steering column) on the dash? If yes, you just have to love that period correctness! Sign of the times.
The black knob left of the two is the dash dimmer, a rotary rheostat switch made by Lucas.
The chrome finished lighter knob at the right is not FAV issue. It should also be black. Probably replaced over time.
The 1966 Ford GT40 is powered by an eight-cylinder 90 degree vee pushrod engine, with a wheelbase of 95 inches and weight of 1,835 pounds.
revsinstitute.org
The REVS institute is set up specifically to share knowledge about cars generally. They will undoubtedly be more than happy to share info about a car they actually own....