I have a very nice '66 P bass that I got a good deal on because in the distant past (1970s?) someone had neatly routed out and installed a J bass bridge pickup, thereby messing with its vintage value. But also making it, arguably, a more versatile bass. It has a Gibson style toggle switch so I can play either pickup alone or combined. It's a passive set up. The bridge pickup (of unknown origin) is not very good sounding on its own and there's some hum from it. I know that Fralin, Aero and some others make nice replace P/J sets, some with humbucking bridge pickups. Any suggestions here? It's a fine bass and I would like to treat it to some great pickups. Perhaps leave the original P Bass pickup in (which is good), or replace the entire set. Any thoughts? FWIW, I don't want overwound, hot pickups, like a Duncan Quarter Pound, and would probably prefer to keep it passive rather than add electronics.