If you're meaning an Allis-Chalmers plow, to a Super C Farmall, I would say LOTs of modification. I'd say it's be much easier to find the proper plow for the Super C. Does your Super C have Fast-Hitch, or straight drawbar, requiring a mounted type plow...??
I've seen a boatload of modified plows end up in the scrap heap, because they wouldn't plow right, after a lot of hours of work.
You might be able to do some horse trading with your plow, towards one that was meant to fit your tractor.