I went to a seminar that he put on in the early 80s. He was charismatic and articulate, and he had forearms like hams.
I've still got a copy of his 'Keys to the Inner Universe' upstairs. It's the size of a medieval bible, and has got illustrations of every variation of every exercise ever.
Powerlifts: 500/363/573 @ 220 belt only
front squat: 403
dips: bodyweight + 176 x 4
military press: 232