90's Durango - Mechanic told friend to scrap

I have a friend with a late model Durango. I am not sure if it's a 5.9 or 5.2, but he was driving on the freeway, it lost power so he pulled over and it died.

He was able to restart it, but it died immediately.

His mechanic said the timing belt broke and to junk it. I.dontmknowich about Magnums, but don't they have a chain like the old iron? Also, would it restart of the timing gear broke?

It sounds fuel related to me.