Gas engines, I'd probably look at the 6.2 or wait for the new 7.3. I read about issues with the 5.0 and I know a guy that blew a well maintained one at about 70K. I wouldn't touch a 3.5 w/ a 10' pole.

Diesel? 6.7 Cummins.

l told my pap and mam I was going to be a mountain man; acted like they was gut-shot. Make your life go here. Here's where the peoples is. Mother Gue, I says, the Rocky Mountains is the marrow of the world, and by God, I was right.
- Del Gue