I run one as well ; I went with part no 58770-96 and had it cut down 3" ; I am 6' tall ; I look over the windshield at all times ; The air foil does hit the top of my head, but that was my goal; the windshield does an excellent job keeping the wind off the body, especially coming up by the sides of the front gas tank (I previously had a windvest that did not do the job) and would never go on a long ride with out it!
I am not sure of exact height from the head lamp cut out, but could check if you really want to ; however what you should do is sit on your bike with windshiled held at the proper mounting angle and pick a spot that runs in line with your nose, and have windhshield cut down to that level ; my harley dealer charged me $50 to cut it down and it looks perfect.