I wouldn't choose a Dodge to travel around South America, it's very difficult to find parts and service.
For instance, Dodge withdrew from the Colombian market back in the late
70's with the Dodge Dart, since then every single Dodge has been grey market and I've seen a lot of late model Durangos and Rams sitting around non operational, specially those with V8 and V10 engines.
For serviceability and parts availability I would choose a Toyota, Land Rover or Nissan for South American travel. But since we are talking NA built, I would choose a Jeep product, they have good representation around South America and the new models are starting to get here slowly but steadily.
Cheers