The Superscope prints themselves were not cropped. This is how it worked.

The print itself had all the animation sequences full frame, and the live action sequences squeezed. The exception is The Sorcerer’s Apprentice sequence, which was also squeezed.

The print was then screened with a supercope lens, similar to a cinemascope lens.
This resulted in the full-frame animation sequences looking all stretched horizontally. The thinking at the time was that no-one would notice if the animation was squashed, but they thought everyone will notice Mickey looking short and fat, as they would any live action, so they were printed in the squeezed format, so that they would come out looking normal when projected.

It was a horror show, but thankfully the print itself didn’t have the animation cropped, so it is a good thing for us.

I can’t say much more at the moment, but I wouldn’t spend any more time on restoring Fantasia, a work is in progress that is going to be very, very good, and not too long away.

FrankT, personally I’d concentrate on Alice as your first one to restore, it is a lot easier, and was the scan you originally requested. Lessons learned on that less gargantuan effort for restoration would then be put to good use on any future, more difficult project.