I found out during rego swap my car had an accident 7 or 8 years ago - it might explain why the body mount looks like this:
How hard to replace the mount? What sorta cost do you think i'd be looking at to get it good as new? Probably not something I could do - it's been 15 years since I last cranked up a mig.
Tossing up fixing all the bits like this, or just getting another Sierra and parting out all the bits I don't need.