1969 Barracuda 383 Cold Case Radiator

I would just take the radiator to a welding shop that does aluminum Tig welding and have them move the fitting over and then patch the hole that it left.
It would avoid wasted time and shipping charges etc. and have it back on the road pronto.
Then try to back charge them for the repairs, I doubt that it will go anywhere, but at least they will know about the issue.........