A friend of a friend has a pipe bender, and bent the last 6" of the tailpipes so they measure 2 1/2" across at the point where they pass between the leaf springs and the quarter panel.

Another friend welded the downpipes-to-header adaptor flange. He did a great job as you can see from the pictures. It's hard to tell where the seam is.

Both turned out really well and I now have the exhaust mounted except for the tailpipe hangers which should be welded to the pipes. I may use a 3" muffler clamp to hold them temporarily to make sure we have enough clearance throughout.

I had to move the air shock filler valves since we had them mounted directly above the tailpipes which would have melted the plastic lines.