I too would be curious to see the original edited version from network TV. Later cable airings didn't use all of the alternate TV takes.
I know that the alternate Biff life "You caused 300 bucks damage to my car, you son of a butthead" was not there when TBS showed the movie in the 90s - it was just "You caused 300 bucks damage to my car, you son of a [muted]".
Does anybody have a tape of the original NBC broadcast from 1989?