Wilt claimed that over 10,000 people that he met claimed to have been at the game. In fact my uncle, who is a huge Knicks fan and attended tons of games, told me that he was there. I wonder if he realized that that game was played in Hershey, PA.
The audio clip of 4th quarter of the 100 point is available for purchase online- surely if he were dunking free throws, the commentator would mention it.
I sometimes wonder how well Wilt could count, or maybe that he was prone to exaggeration. In 1991, he claimed that he had screwed 20,000 different women. That would be 1 a day since the day he was born. Me personally, I’d probably get some of them confused and maybe have done a couple of them more than once.
Maybe you could ask your uncle how Wilt was shooting free throws in 1962.