Help: M300 3.8 Aluminum

I ve kept an old M300 for three years and now, I finally decided to start the project. I bought the bike for $30 and it had a ROCK SHOX fork, threadless. Also, I want to know what year the bike is. I've done some research and I really could not determine the year if it's a 93,94 or 95. The seat stay is not the wishbone style and it says 3.8 aluminum.

The main question now is since it came with a suspension front fork, what would be the max travel can I use? I have a 2000 MARZOCCHI Z1 X Fly and has a 100 mm travel and a 1 1/8 steer tube. I've contacted MARZOCCHI early today and they told me they can install a 1 inch steer tube and reduce the the travel of the fork. Is 80 mm still too tall for this frame? It is a size 14 frame and it will be for my girlfriend. I still need to get it repainted and get new decals. I have a lot of spare MTB parts so I'm not really spending anything major on it except for the paint and the fork. This bike has some nice parts. To name a few, it will be using CHRIS KING hubs, XTR 9 speed cassette, 07 XT shifters, MAVIC Ceramic 517 SUP wheels, KORE skewers, GEAX Seguaros, STANS No Tube conversion, FSA K Force lite bar, ROCK SHOX seat post, XTR V Brakes, Deraileurs, XT crank set, SDG BelAir saddle and so on.