The Dodge 5.9L engine (specifically referring to the Magnum and earlier versions, not the Cummins diesel) is
generally considered a non-interference engine. However, there's a crucial caveat: This is largely dependent on the specific year and variations within the 5.9L family. Some very late-production models *might* exhibit some interference characteristics under extreme circumstances, but generally speaking, valve-to-piston contact isn't expected under normal timing belt failure.
Therefore, while it's safest to assume it's non-interference, always verify with a specific year and engine code to be absolutely certain.