Good lookin' II--I guess what you're talking about would be about the same-I added the map light (are you talking about a swing away type,mounted between the sunvisors?-I'm not that familiar with the Mustang II interior) to a '79 I had,a long time ago.The mounting holes were there-probe with a needle to find them-and I think the power wire was behind the upper windshield trim........or did I have to run a wire? Forgive me,it was 10-12 years ago!!
__________________ "Life is not a journey to the grave with intentions of arriving safely in a pretty well preserved body,but rather to skid in broadside,thoroughly used up,totally worn out and loudly proclaiming.....WOW!.....What a ride!
"As you grow older,don't slow down,speed up-there's less time left"--over 45 and just now realizing how much I don't know | 
Overhead map light 
