The cavity depth varies from bass to bass - my 72/3 Frankenrick didn't need any routing to insert the push/pull pot

, but I know other basses of similar vintage did require a little extra wood removal

. This is probably not the case for basses made since the vintage tone circuit was introduced as standard on the 4003.
BTW you'll need the cap as well - the V63 is capless...
Wow, I hadn't even noticed I'd broken the 2000 post mark a day or two back - shows how observant I am!