Well I am coming along with the process of fitting disk brakes on the 3600. Not as easy as I had hoped... I have the the spindle diameter, bearings, and spacers figured out. I am now working on the bracket. The first attempt had the caliper too low. I am working on a new bracket to move the caliper up so the tie rod end will not hit the caliper.
http://i39.photobucket.com/albums/e187/Sawmill/108-0887_IMG.jpg
Once the bracket is done, I think it might be ready to try out!
Rick