I recently made the change to 50's wiring on my Eastman S guitar has Lollar P90's, which sound fantastic, but would loose the brightness I wanted at lower volume, especially the neck pup. The original caps were .047uf orange drops and the pots are 500k. I made the change, moving the cap from the input leg to the output leg on the volume pots, and to the outer lug on the tone pots and moving grounding on the center lug. I used a .015uf cap for the neck pup, and .033uf cap for the bridge pup.
The result was subtle, but noticeable. Especially with the neck pup, which to me was a bit boomy or muffled sounding. It now sounds a bit clearer and has a nicer distortion sound to it. I like the sound that the changes made, so if you are interested in trying this change, it's easy to do. If you don't like it, it's easy to switch back.