That will be a Mud Hog unit and I think it will interchange but at the most you will have to buy some different fittings to hook the hoses up. When we put our's on our 2366 last fall I was thinking the change in the hydrualic lines was before the 88s were introduced but if you call Mud Hog I bet they could tell you for sure.
we put a mud hog on our 1688 last year that came off of a wrecked 2188 and it works great. i am not sure after talking to mud hog that i have the flush and presser return lines hooked up right, but it is working.