In my opinion the attendance was much higher than the official 38,000+.
It was bedlam that day.
The Police numbers were high, but insufficient to deter ticketless chancers from both clubs, many of whom got in one way or another, before or during couse of the game (when security eased off).
I was in the East End, which was packed to the rafters (literally!) Older members will remember the climbers who would shin up the steel girders and watch the game sat astride the cross-beams; usually getting nabbed by the Old Bill at the end of the game.