I was the originator of this install (not trying to take away from William, just my part of the story). I removed the inflator portion of the airbag unit so it cannot deploy, keeping the bag in there to keep the proper feel.
The splines are a direct fit. Weight is heavy, so feeling is nice. I love the grip. Driving 115 now with the stock wheels despite it's leather makes me miss the wheel on 855.
I actually modified my setup with a horn ring provided to me by Ward (467) from some other car (early galant?, don't recall) and had the horn working. It stopped for some reason and I have not fixed it yet. Maybe a wiring issue.
I think I posted a pic once, but can't remember for sure, and can't find it now.