Originally Posted by jstern
Still haven't read, but that image looks more to me like he was grabbing a rebound. I mean he's jumping off his right leg, with the ball in his right hand, in a sort of weird position. If he were to do a free throw line type dunk, being a righty, he would jump off his leg, with his right leg going forward, ball on right hand, and vice versa if he were lefty.
In that era the paint was always crowded with bodies unless one team/player out ran the rest. The paint in that image is wide open. Wilt is taking off, and the two players look like they're slowing down giving up on a chase. This is almost certainly a fast break play. Not a rebound. There's nobody else in sight except him, two guys and a ref that's also running forward.