Here's a pic of the top left area of my ring .... it already has mounting holes (for the stock coil I will assume). This will make the fabrication of a rear mount trivial.
The front mount / idler pulley mount will take more thought, as the angles of the pulleys are set by the diameter of the crank pulley, and the final location of the fan ring. I am using my FAT pulley as it has already has the 36-1 trigger wheel mounted for my ignition system.
I'm going to mock things up with MDF wood and then have a chat with some machinists at our next club meeting.
Sandeep