In my soil, an 85+ hp tractor got worn out fast pulling a 4-16 plow. I now run a 140hp tractor on a 4-18 plow, and that seems to be a good match.
Obviously I have kinda tough soils. :)
You need to be able to move the tailwheel up to be behind the 3rd bottom if you drop one off. Without looking too close or knowing much, it appears that would be possible?