You would be the first as far as I know. Wouldn't be much different then trying to use any onther incorrect harness. The basics are about the right place, but nothing would actually line up and fit correctly. You would have lots of extra wires and maybe lacking a few. Then you get the joy of snapping the 20 year old plastic tabs off on all the connectors and later finding the harness shook off because the lock tab is now broken.
You would be a lot better off starting with a basic generic street rod harness if you don't want to try a Bronco specific harness.