I couldn't find any great pictures of the back of a 185, but I found the ones below. It looks like it might fit. The things to be concerned about would be:
1) Are there any other holes/etc in the way on the hitch plate at the 11" down position?
2) Will one of the 'dogbones' fit on the flat center of your fenderdeck?
If there's nothing in the way, and a 'dogbone fits', you're probably okay. I can't guarantee anything though, so please check it out as thoroughly as you can before you start to drill!