No tire lists the recommended tire pressure for a particular vehicle. It's ALWAYS the "maximum safe cold pressure" listing on the sidewall.
On a truck tire, especially those larger than 15" diameter, it's usually WAY over what you will end up running. Wayyyy over!
There is no one recommended pressure. As said for the fitment part of the discussion, every Bronco is different, so your tire/wheel/vehicle weight combination might be different from others.
But a typical starting point is to start at 30 and come down from there as needed. Many of us run down into the low 20's in the rear and the high 20's to low 30's in the front.
Here is where the "chalk test" or similar comes in handy. The rears are easy to find that sweet spot, but the fronts are not quite that simple especially if you have lots of camber and/or toe-in.
The tires with heavier load ratings, such as a Load Range E vs a Load Range C will also typically have higher max pressure ratings. My pickup's 16" E-rated tires for example have an 85psi max rating. Funny thing though, is that I run almost that much when fully loaded up! Otherwise I probably have 50 in the rear and 65 in the front on my particular truck.
The '71 Bronco on the other hand, with the crappy Thornbirds with a 35psi max, runs about 35 in the front and 30 in the rear.
The '68 with BFG 31" KO's (I think?) I run about 22 in the back and 32 in the front. I've tried anywhere from 20 to 40 in them and this is what they (and I) seem to like.
If you don't do the chalk test right up front, keep an eye on your tire treads and sidewalls. If you see tire wear down the side it means you have too little pressure (possibly by a lot!) and if you see wear only in the middle, it means you have too much pressure. This is why the rears are the easiest to judge. Because they sit relatively flat on the ground compared to the fronts. And they don't have to go through the same turning awkwardness as the fronts.
If you see the dirt/dust worn off in the middle and the dirt remains on the sides of the tread, keep letting air out a couple of pounds at a time until it's about 1/4 to 1/2 inch from the edges. This leaves some leeway if you load up your rig heavily on a regular basis.
Otherwise, let it wear off right out to the edge of the tread. If you're not going to be carrying extra weight, the extra safety factor of more pressure is not needed. And you can always add it down the road if you do decide to carry a load of firewood!
paul