in 1995 it was 120cm long, so assume you're using ahead even though it was still threaded even in 1995, you should be able to get away with the 185 if you use a different headset and 35/40mm stem stack.
185mm-40mm-120mm+3mm, gives you a 28mm stack height to play with.
Which shouldn't be too hard to find.
My 17.5" 1994 Muirwoods has a 120mm headtube and runs with it's original 160mm threaded steerer forks.
I did try a set of ahead forks which had a steerer length of about 190mm and they fitted fine.
Switched back to the original forks though as they are so much nicer.