I'm looking at a purchase of an out of state, 2001. 5, 3500, QC with the HO Cummins and the NV5600 six speed and register it in California. I know they offered this setup in California in 2001 with the same horsepower and torque, but does anyone know if there is a difference? Catalytic Converter? EGR? Will I have any problems with emmisions? Thanks a bunch.