The SSL-3 quarter pounder for strat is what I was referring to. Although I'd recommend that you get the tapped version which is surprisingly versatile and sounds like a low output single or full bore distortion machine.
I make a lot of guitars and most of them have pretty hot P-90s with very little or no perceptible hum. I use the "advancements" of good grounding, insulation, and copper foil tape (or carbon paint).
I’ll give SD a call. I want to stick a 5 way in there with the JB jr having 4 conductors. Do you have a link to a wiring diagram as to save mucho time? Much appreciated …