Re: capacitance and wiring for Lil 59 + JB Jr with one vol, one tone and 3-way
500K wouldn't hurt. I used to use the neck model JB JR. as a bridge pickup because I thought the bridge model wasn't quite bright enough. That was in a Strat with stock neck and middle pickups and 250K pots. Robert's suggestion of going with 500K is a good one for the application you're talking about. Go with 500K if you tend to like a brighter clearer tone and 250K if you tend to go for a warmer mellower tone than a usual Strat tone. Lew