My truck had a 6.2 from the factory but somone put a 454 in it at some point. When i got it the 454 had a dropped valve. I want to make it a deisel again but the 6.2\6.5 arent that good and the cummings is very expensive. I have a few friends with the 6.9\7.3 IDI and they are great.
I have access to a trans and transfer case already i just need the motor. The 6.9/7.3 can out preform the 6.2 no problem. They dont have any computer so they are easy to get running. And a lot cheaper than a cummings.