Howdy Bruce,
If you are going to hook your 617 to a Mog tranny my questions are; Are you going to use any other parts of the Mog?¿(frame, driveshafts or axles) Can you mention what other application you have in mind without giving away any secrets that you don't want to let out?¿ The reason I ask is the engine /tranny on the Mog is part of the structure along with the driveshaft and frame that hold the axles in place. Another unique thing about the engine/tranny is that the engine is connected to the frame by a bolt up front and the tranny is connected to a "clamshell" that is put over a cross member of the frame. (if you can picture that you are better than I am
) Hope this helps. If you can give more info I can ask some people that have done some conversions.