In June 1990, I heard Sen. Simon give a campaign speech, in a Lutheran church, and he said that he was pro-life. He also said that the federal government should decrease welfare spending.
He wasn't. He was "pro-choice," but, like so many politicians, he could claim he was "personally" "pro-life," if it fit the audience he was speaking to.
Wikipedia has Simon as a social liberal, fiscal conservative. That seems to mesh with my memory of the man. There's nothing there about a stance on abortion, however.