Jim Ryun did NOT race final 300m in 36.5. There were no splits shown. I cannot find evidence of 800m race passing 500m faster than 68.xx and racing final 300m, 36.xx. Emmanuel Korir passed 500m in 67.xx and could not race final 300m any faster than 37.xx. Sorry, no 46-flat for Jim Ryun for 400m as all the old timers say he was capable. Ryun couldn't even run sub-1:44 800m. Keep that in mind.