Getting old. Sold the ranch. Sold the tractors. Moved back to the city.
If it has a pto shaft on the tractor centerline and a 3-point hitch, sure. You may need to add a few hundred pounds of weight to the front end to balance the weight of the mower.
Which "B"? Early models would probably struggle with a 4' mower. Late models should handle a 5' mower.
Does it have a PTO? (Required to power the mower).
Does it have a 3-point hitch? If not, you could still use a pull-type rotary cutter.