No change other than butterflies.
In 1992, Perot was the candidate of ideas. Well, one idea, anyway: deficit reduction. His message as a successful businessperson was not, "Hey, I'm a good businessman, so I'll be a good President" but rather "Hey, I'm willing to talk about this thing that no other candidate is willing to talk about, and if you agree with me that it's serious, vote for me."
To that end, what Perot needed in a VP candidate was a serious, establishment political veteran. Stockdale was meant to be a placeholder; the problem was that veteran campaign manager Ed Rollins quit in June, and then Perot himself (temporarily) dropped out of the race in July, meaning that Stockdale was never replaced.
Trump wouldn't have ticked any of those boxes for Perot in '92. You might replace "Who am I? Why am I here?" with some equally gaffe-tastic remark, but the end result, IMO, would be the same.