OK, I've actually had a chance to do some final prep on my EB-3 bass. I pulled out the electronics and it's frankly a disaster. I think I have the original switch (still looking for it), the pups and pretty much nothing else. No pots, no choke, no caps.
So, I have no dillusions about recreating the circuitry and I'm not intersted in torturing myself trying to do so. I do have the original Gibson series 1 and 2 wiring schematics, but I don't see me being able to reproduce them. From what I read at Fly Guitars, my bass was probably a Series 2 based on the maple neck, etc. However, I sure would love to have the two pups wired up to a 4-way switch and have them work! I think someone screwed with the wiring on the pups and I'll post a pic or two tonight when I get home to get your opinions. Thanks!