Hello, my parts manual lists 168103-a for the pto drive shaft and I haven't had much luck finding it. The shaft that came out of the tractor is 67.125&quot; long and a 17 spline, which looks to match up with part number 30-3054527. Although that part number shows fitting the 1750-1955 and a few white models. It is not listed for the 2050/2150. Does anyone know if the shafts will interchange? If not is the 168103-a the only thing that will work? Thanks in advance.