Rickenbacker basses utilize a 33.5 scale - not quite 33 exactly, but close. However, the REAL question might be, what sort of overall TONE are you going for? Pickup placement will have a LOT to do with the final outcome of THAT little issue, as well as potential playing comfort issues (i.e. the slap technique is easier to manage on a bass with more room between the fretboard end and the neck pickup).