AFAIK the shortened torgue arm is to gain height from rotating the FD around the pivot. Don't know what impact it has in the Universal Joint nr the FD. Prutser might be able to answer that.If/when I do this I'll be looking to put in the aftermarket driveshaft so that I can service the U-joints.
My '91 R100GS thread is here
My Ride photos are here
It's just better when there's twins involved....