Daily Driver.. LA318 vs 360 Magnum
...and as I've posted before, my family and close friends have owned quite a few Dakotas and Durangos.
We've found the 5.2 with 3.55 gears (and OD of course) gets 16 MPG average and the 5.9 with 3.92 gears gets 13.5.
How much of that is the gear, how much is the cam and how much is the displacement is up for debate.