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As I recall Mark @ Moto Guzzi Classics in Calif. put a 1100 motor in a loop frame Eldo not too many years ago and had to lengthen the motor frame part to make it fit, which led to a clearance issue of the front fender. :D Might want to give him a call.
The downside I see with doing the loop timing cover is that then you have to drill the case for the generator brackets, pre-emptively account for the bracket breaking, and still have a fairly low output generator perched up there when you're done -- unless someone's got a belt drive alternator solution. The bosch system, although better than the generator, isn't a lot better compared to the ducati type in 1100.
I was told I could scrap the front of the convert motor and use my existing Eldo motor timing cover. I want a lighter flywheel. I want a C5 ignition. I want the best most modern charging system. Greg Bender helped with the wiring on my T. He's helping on this project as well. This bike will look its age but run like a champ.