Hey welocome to the site. I think you may find more answers to your bronco questions at one of these sites that specialize in your type of vehicle. You're welcome to post, but I don't know if you'll get many responses.
http://www.fullsizebronco.com/
http://broncozone.com/
http://classicbroncos.com/
Hope this helps.
Later,
67Ruckus