With the mileage you have gotten from your tires (60K) you might consider sticking to the same tire. That is awesomely good for a truck tire. Most folks are replacing truck tires every 30K miles. The rubber in the LT tire could be harder and the sidewall stiffer than an equivalent size of P metric. I’m not sure about running a P metric tire at 50 psi; sounds high for a passanger car tire.
You might save a few bucks on the P tires and give it back if they wear out in 30K miles.