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6.0=03-07
6.4= 08-10. (2010 might be a 6.7?)
6.7= 11- present
You need to make a note to the 6.0 that the 7.3 was also available that year, for about the first half or first third of that model years run.
Other than the sound of the engine the trucks are nearly identical (i dont think 03 6.0s got the newer headlights i could be wrong tho), i thought the 6.0 and 7.3 got different door badges, with the 6.0 having red lettering, but i havent popped enough hoods to verify that.