WI Keith Joseph didn't make a fool of himself, successfully challenged Edward Heath for the leadership of the Conservative Party and eventually led the party into winning a general election sometime in 1978-79?
I swear there was a thread on this earlier. I think the consensus was Joseph would make more gaffes, lose a 1978 election narrowly, and be replaced by Willie Whitelaw. If he becomes PM, biggest difference is that he's more likely to not fight Argentina -the logistics train looked horrible to the Cabinet at the time. Something like that.