I was thinking about making some adjustments to tire pressure as well. On the current tires, I have just under the max pressure on the rears (~78 psi) and 5 less on the front (~73 psi). I am looking for an all around setup that I don't need to fidget with all the time ideally. I don't really drive major mileage or commute regularly luckily. Do you think 255/75/R17 STT Pros running at ~70 psi would be a fair all around compromise for example?
Part of my rationale for the STT Pro is that because of the more aggressive pattern I should be able to run them at a higher all around pressure than the ST Maxxs for my given traction requirements. Feel free to correct me if you think this is incorrect.
You asked, so here are my thoughts:
Tire size... The 255/75R17 size you're looking at exists because of the Wrangler Rubicon. I've not seen any yet that have a load range higher than C. I would not put a LR C tire on a 3/4 or 1 ton truck... I would recommend the size I'm running as being a good alternative: 255/80R17.
Tire pressures... First, check your door sticker. Run your front tires at that pressure. On my 2500 GMC, that pressure is 55psi. That was on tiny 245/75R16's, and generally speaking, bigger tires require less pressure to handle the same load as a smaller tire. There is no reason to run more pressure than the sticker recommends unless you have a heavy snow plow or big pipe bumper and winch adding considerable weight to the front axle.
Ideal rear pressures for an empty truck are usually the same or even slightly less than the door sticker suggests for the front tires. (Trucks are often front heavy when empty, and since you're always mostly empty from a weight perspective, this applies to you...) Running the rear tires at higher pressures when empty amplifies any axle hop tendency, reduces traction on any soft surface, creates washboard very quickly on dirt roads, wears the tire out much faster, and makes for a rough ride on back roads.
Your desire to run equal pressures all around is for cars, not trucks. Get over it. For trucks, you run appropriate pressures front and rear for the axle weights. "Compromising" pressures on a truck means running the rear tires at or near max pressure all the time becasue you actually use the truck to haul things regularly, and you're compromising things when empty. There is no need to "compromise" on your truck, as you're not hauling regularly, if ever. There is certainly no reason to run such high pressures on an empty truck, aside from keeping the TPMS light out for the rear axle.
The suggestion in the post above is a very good sanity check. BFG also publishes load/pressure charts IIRC. Ford may be erring to the high side, after their Firestone debacle from years gone by, so a sanity check may show that the door sticker is even higher than it needs to be...
You can get axle weights at any gravel pit, grain depot, or highway weigh station when it's not busy. Or you can probably look them up for your truck and just add several hundred pounds to the rear axle.
As usual, YMMV, but probably not by much...