Sorry, not sure what's the difference in part numbers. But a quick call to Torklift should be able to get you the answer. I found them them very helpful and willing to answer any questions you may have.
Just guessing I think there would be a difference in bolt locations/patterns on the frame rails given the different cab config's (regular, extended, crew etc.). I'm sure it would be fine but I personally would not drill additionl holes in the frame
rails. Regardiing the rears... are you going to be installing one of their "Super Hitches"?
Just my $.02.... Good luck!
2012 AF 992S
2002 F350 w/7.3 SRW CC with Banks goodies, Firestone Airbags and Torklift Fast Guns, Super Hitch w/48" truss ext.