I am rebuilding a Fuji Supreme 12 speed road bike. I am still debating whether I will make it a single speed or 12 speed as original. I have a handlebar/stem/brake levers/grip shifter set salvaged from a Raleigh M-20 MTB. I was wondering if I can use that on the Fuji as the Fuji has a steel drop bar and I don't like drop bars, having ridden Indian utility bikes in my youth and MTBs in the US. If this build works out, it may be decked out as a road touring bike.
The question is will the combo work? The right grip shifter indicates 7 speeds so I will not be able to use the 7th one. Also, it has click stops which may not be compatible with the friction shifted Fuji. The right shifter indicator is also off. It stops at 4 or 5 and shifts past 1, may be a small adjustment but is that doable?