I do find it funny that they mention the Fords 6.2 the most powerful when the LS3 V8 6.2 by GM packs 420hp and 450ft lbs of torque. I am sure they may eventually add it to the list of possible engines for the HD trucks. If I was going to by the gas it would have my vote. GM not including it as a HD engine option may be a strategy to push Diesel sales.
