OK, I'll throw this one out there since it is not red white and blue either.
1977 with pics of Bill Stroppe and crew installing the custom winch bumper and siren.
It has a few of the Baja items such as mag wheels (but with staggered front and rear offsets like used on the race Broncos), bumper braces, roll bar (modified to hold the stretcher), but has the standard steering wheel and of course factory auto and power steering. Tons of other mods for use on the balloon chase as an ambulance.
Nugent also had/has a Stroppe built full size (can not recall the year).
Wow...these are some great pics of that beauty that I've never seen! First time I've seen those side pipes, for sure. What winch did they install? I love Duff's Pony Express and obviously Big Oly, but this Bronco is one of my top 3 or 4 all time.