I have a 99 7.3L. My family is growing and the extended cab is a little to small and not comfy for the kids. I have been looking at a newer 6.0L, bad I know theres lots of problems with those. I would like to find another 7.3 with the bigger cab but they are hard to come by. I have heard alot of problems with the duramax aswell. The dodge cummings is a great engine but the rest of the truck has problems, so I've Heard. Not sure what to do.....