I've owned this bike for a while which I used for commuting. It had Suntour XC LTD on it but the groupset was in pretty bad condition so I decided to give it an overhaul. A friend had a 7-speed XT groupset which I acquired and here is the result. I'm pretty sure it's a 1991 Hammer, although I'm happy to be corrected.
Frame and fork- 1991 Rocky Mountain Hammer
Groupset- XT M730 series
Headset- XT 1 1/8 threaded HP-M736
Cranks- Shimano touring Biopace
Bottom bracket- Shimano UN-55 127.5mm
Seatpost- Deore DX 27.0
Brakes- XT II Canti's with Specialized fork mounted cable hanger (works well with a bit of modification)
Stem- 1 1/8 quill Profile Boa
Wheelset- XT M730 hubs to Ritchey rims
Saddle- Rolls Titanium
Man this took a while! Lots of little hiccups along the way, which is to be expected with old stuff I guess. I wanted to keep the build as period correct as possible and I'm really happy with the result.
Please excuse the amateur cable routing as I'm still learning.
Oh, and I think I stuffed the chain length up as it doesn't like big sprocket- big chainring.
I had a bit of trouble with the front derailleur routing and in the end had to use a cyclocross pulley and the traditional bottom pull XT. I'm guessing the FD-M736 top pull didn't exist in 1991 (well as far as my lazy internet research goes)
Overall a great nimble little bike.