When I went to UPT in 1975, the usual question was eyesight. However, I remember a USAFA grad that was too short but was still able to enter UPT. He had flight boots with extra "pads" affixed to the bottom of his boots. These pads effectively increased his height and allowed him to depress the pedals of a T-38 without killing himself. FYI, the T-38A takeoff procedure was to
- line up on the runway and advance both throttles to 100% thrust with the brake pedals depressed while you checked engine instruments
- release the pedals to be sure that the nosewheel wasn't cocked to the left/right
- advance both throttles into full afterburner while looking for two nozzle swings and a large increase in fuel flow on the gauges.
If one's height prevented a pilot from fully depressing the brake pedals in the first step above, there might be a very serious accident right there at the end of the runway. As far as I can remember, he graduated from UPT.
If you approach Gen Clark for a waiver, you might want to think out of the box like this previous graduate did.