The 1 1/2 ton & up [ including the C.O.E.] grill bars will work if you install them on the 1/2 ton grill rear bars & upright brackets. The 1 1/2 ton & up grill bars are the same width as the 1/2 ton but, they are 1/2 " taller. The top bar on these larger trucks wont fit the contour of the smaller hoods, I use a 1/2 ton top bar here. Although it is 1/2" shorter than the other bars , you cant tell the difference because the parking lights are under it .
1/2 to 1 ton fenders, hoods & grills are identical. 1 1/2 ton & up fenders, hoods & grills are larger. Cabs are identical on all conventional models. Cabs were only different when you jumped up to the COE models