Buy your pots and switches and tone caps strictly from Stew Mac, they have better quality parts than you can get elsewhere. Their pot values tolerances are tighter.
Something to think about if you have to change pots is how does the guitar sound?
Potentiometer values affect tone. Very easy to measure pot values with an ohmmeter.
How do volume pots work? How do tone pots work for guitar? We explore all the inner workings and wiring of volume and tone pots here.
www.fralinpickups.com
What vintage 335 pickups? Do they say Gibson USA, or have Pat # stamped in the base, or have Pat # stickers, or PAF stickers?
If you can split the neck p'up down to one coil with push pull pot on the neck p'up tone control, that is quite fantastic with a PAF style pickup, gives you a Strat like neck pickup tone, sweeter and bluesier.
If you had 4 wire pickups in both positions, you can also go in and out of phase in the middle position, out of phase being a very desirable sound.