Ryan,
Do you use the loader a lot? There are stories of metal fatigue and frame failure from this loader on this machine. I don't see either in your pics. Have you found or do you have any reason to believe that this design needs "upgrading"?
That would be welcomed. It seems that my D312 was replaced with a D310 and the last holes in the rails, where I think the brackets go, are directly adjacent to the oil pan. It does not look like the cross member that joins the two rear brackets has a clear path.
I'm looking for a Mounting Bracket to put an International 2250 loader on my Hydro 86 and/or to talk to someone who has the 2250 on a 666 686 or Hydro 86.