All of the Konas I've owned (6 and counting) have had a 68mm BB shell, so no worries there..
The axle length is really dependent on the cranks that you plan to fit though, older XT or Deore cranks (stamped M730 or MT60) require a 122.5 axle length, but finding a posh bottom bracket in this length is starting to become a tricky exercise. These cranks are also a little old for a '94 frame if you want to do the whole period correct thing.
Newer square taper cranksets tend to need an axle between 110-118mm depending on the brand and you will probably find BB's easier to source. It's probably worth deciding on the cranks that you would like and then checking for axle lengths on the web, there's loads of forums and sites that should be able to tell you what you need - and on here of course
Several bikes, one supportive lady and still trying not to buy anything else!