· 6.0 vs 6.4 vs 6.7 cummins. I'm looking at a truck to dd everyday. Been looking at several 6.0s, 2 08 6.4s, an 07 6.7 and an 08 6.7. Whatever I get will be tuned, *****d and whatever it needs to o be reliable. What does everyone think. _____ 01 f250 ccsb 4x4 400/400, twin terminators, s480, bts and supporting mods --sold ...