Hello Nick:
I put 4-wheel trucks on my MTL paired-window coach, but I used American Limited PRR 2D-P5 trucks. It was actually very simple. A new bolster hole needs to be drilled in the correct location and for me, it corresponded with the raised square just outboard of the MTL bolster. The American Limited trucks come with a screw as the pin, so a slightly undersized hole provides a good grip for the threads. It should be simple to adapt the new bolster hole to whatever pin you use with the WOT trucks.
Although not a PRR car, the paired window coach has the exact window pattern for a PRR P70 coach, so with the the correct trucks and added roof vents, it makes a pretty good stand in model.
Doug Nelson