Roller cam brakes were last used in 1989 I think. 1990 had a U brake in the rear and cantis in front. Cantis were then used until V brakes came about. 1996 BOTE had V brakes.
In general Cannondale MTB frames were measured in inches from BB center to top of seat tube. 18" was called a large in 1999. Road frames were measured in cm from center to 1" down from the top of the seat tube.
Typical for single pivot calipers. Most if not all dual pivot calipers have a screw that lets you center the pads after the mounting nut has been tightened.
I don't recall any team bikes that were unpainted but Cannondale supported lots of teams. I have road frames from two different teams but no team MTB frames. A friend raced for a Cannondale sponsored team but only on road I think. I'll try to ask what he remembers.
You might be able to use the conventional threadless adapter with a rise stem to get the bar high enough. It seems to me there are some long adapters available. I would check the Nitto catalog.
I think they were only called B of E in the catalogs prior to 1993 models, just had the SM800 or M800 model decal in the early years. 1993 and 1994 bikes had 1 1/4" forks and B of E chainstay decals.
I have some doubts about it being a prototype due to the January 1994 build date code. Super Vs were in the 1994 catalog and some would have to have been made in 1993 before the catalog photos were taken. My guess would be that prototypes would have been tested in 1992. Nice example of an...
It wasn't unusual for bikes to be delivered to dealers with parts that were different from what the catalogs stated. That may have been due to supply issues, changing the spec, or simply running out of a part and substituting another.