d15 series ii three point on series i d17

Some things to consider: #1. A 4500 lb D-15 series 2 can destroy one of those category 1 hitches if used heavily. How long would it last on a 5500 lb D-17 ??   #2. I think the torsion bar and draft arms would bolt right on, but how do you intend to get the splined lift arms off the splined shaft??  You could remove the lift arm housing and remove both shafts with the lift arm still attached, I guess. It would mean removing the lift arm housing on both tractors to get it done. 

Dad pulled a heavy Oliver 3 bottom plow with his series II D15 for over 30 years and never had issues with the 3 point lift. Staying within the limits of the 46hp tractor or any tractor for that matter, is key to not overloading it causing breakage. Working outside of its designed load is asking for problems. Dad’s D15 sees a lot of 3 point work till this day on our farm, mainly sickle mower and blade work. Other than the garden it hasn’t plowed for 20 years.