Yes. Usain Bolt is 1.96 and his stride length was 2.71 in the 40-80m section during the 9.58. A group of men between 9.71-9.86 has 2.49m stride length, for a body height of 1.81. That’s 1.38 SL/BH ratio for Bolt and the other guys.
Yes.
Griffith-Joyner 10.61 - 1.35
Jeter 10.64 - 1.36
Jones 10.70 - 1.28
Arron 10.73 - 1.39
Fraser 10.73 - 1.36
(wind-legal and low altitude marks, SL for 40-80m segment).
Yes. Ratio decreases with level of performance.