I would think it would do well with 3x14" plows
my neighbor has a 175 MF diesel and it has 4x14" pulls them fine.
as you said, a lot depends on the soil and the condition of the tractor (motor and tires)
I have a 1957 TO35 that came new with 3x12" plows,
I guess back in the day, it could pull them fine, but like me, its not as strong as it once was.
always better to have a smaller plow and spend more time plowing than to overload your tractor.