What Alex Said.
I've looked at this, and walked away. While I've got a 'machine shop' in the garage, I'm not experianced enough at any of it, to start milling the cases. On top of the fact that a mistake can mean serious problems, I'd much rather leave trick mods like this to the people with the resources and time to do it right.
Ryan, I wouldnt bother. Nothing 'bolts on', and there are LOTS of custom-one-off parts your going to need to mill, drill, shape, and trim.
Just my