[455Grandville]

6.3's biggest fault is if the air suspension needs work - dumptruck full of $ to fix. Ive ridden in a 300SD, similar body to the 6.9, but with a 5 cylinder turbodiesel. Ive always wanted to get a old Mercedes Unimog to go out in the deep woods to haul firewood back to my house, but they aint' cheap.
You'll find a 455 is a simple, durable engine that will withstand alot more abuse then any new car. With simple mods you can get alot more power out of it easily.