I think I've got the mount spacing figured out, but it will be a while before I can take it apart again and install the correct length bolts and get pictures.
In the mean time, I've started chopping the rear quarter, partially inspired by Chicago's 60:
http://forum.ih8mud.com/nv-battle-bo...-1-4-chop.html
I didn't get pictures of my initial cut to the outer fender, basically I cut right at the bottom near the apex of the curve, and two vertical cuts up to where I want the chop to end.
I want the chop parallel to the frame, and fortunately the frame is sitting level right now. This means I can use a laser level on a tripod to line up my cut. You can't really see it, but the laser line is along the top of the tape.
Hopefully I can fold the outer panel under, I'll have a lot of cleanup grinding to do before I can test that idea...