I don't know if repairs are enough to fix the 2012/2013 chassis out there. MMC totally replaced my 2012 chassis and from what I saw of the original stock unit and what the new replacement is there are just too many changes. Everything from the front of the body frame forward has been beefed up, strengthened with added gussets and very possibly tube wall thickness.
It's your basic total rebuild. I believe qualified welders would be good to go with a complete manual with regard to specification changes. Anything less is a hope and by golly...
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
