I am 6'3", give or take an inch. (Gave my flight physical to my recruiter or else I could actually check.) And I know the Kiowa is retired, I just find it funny how often it still shows up. I had a question on my SIFT asking about it as well.
My son graduated Flight School Sept. 2013, he had selected Kiowas only to find out the December after graduating that they were being retired. Only bring this up because he is 6'-5" and yes he could still squeeze into the 58, though looked awkward getting out. During selection when he chose the 58 they asked someone to take a look at him, I guess he was in a good mood that day because he gave the ok. During the selection for the following class they said no to someone that was shorter. Needless to say he endured a lot of "Tall" jokes while he was flying the 58.