I've never seen one of these up close, but if there is any room behind the block, you could drill out the block, run a shoulder bolt all the way through and put a nut on the back side. If there is not enough room for the nut, but there was access to the back side of the block, you could countersink where the nut goes. Just make sure the nut bottoms on the sholder bolt rather than tightening against the block. That will assure that the bolt won't pull the entire assembly together, putting it in a bind. Lot's of ways to fix this simple problem without welding.
Agile Ride improvement package