60's and 70's jazz are fairly different sounding to my ears.
See if you can find someone who's done loads of pickup recordings. I downloaded a set from Talkbass about 10-15 years ago of P bass pickups recorded in the same bass - it's really interesting and I can crank them through headphones/stereo/bass rig to hear a rough guesstimate of the differences or at least the broad sound of them.
Buy a nice set of something second-hand from here, and then if you're using a preamp or a wiring loom use a chocolate box connector or similar so you can swap pickups if you want without a soldering iron.