I have a couple Katanas, 2001 and 2003. I've never looked at a '94 Katana, but I'm guessing you couldn't do it, and if you could it would be with major modifications. The mounting holes are pretty specific, and I doubt they are the same.
Let us know if you find out. If I see a n early model I'll take a close look and let you know what I think. I should be able to tell since I've had mine apart dozens of times.