LA 360 or Magnum 5.9

Go magnum. I did and amazingly happy vs the old 318, the price was not even much more vs what the 318 would be (maybe less). I even reused the stock rotating assembly (probably not possible with the 318). I did it all myself and it wasn't bad at all. Even found my 5.9 on a craigslist Durango part out and negotiated it down to $300 including all wire harness/ computer / accessories and such. They are out there just keep looking around.