that is a good start,
but you will find the disc plow will try to push the tractor to the left.
on the fergy disc plow note the trail wheel with cutter.
I have owned an AC disc plow made by Athens plow company and this fergy disc plow.
both plows must have the rear cutter blade that digs in and keeps the plow running straight.
without the rear trail wheel i do not believe you could plow with a disc plow.
does you plow have a rear disc wheel to hold against the cutter blade as the blade plows?
I have seen on youtube a cub fitted with a disc plow, one was under the belly of the tractor and the other was a rear plow more like mine.