FastOrange
OBSless
I didn't see this question answered. The reason that the body is higher on the -800 chassis is because there is a body lift incorporated into the design/construction of the frame. Translation, they welded/rivetted the mounts higher on the frame, or used taller mounts. RPO: HVY = Identification, 2 inch body raise, H.D. model
No, that is incorrect, the 2500HD DO NOT HAVE A "BODY LIFT". they have a 2" taller frame, to clear the Allison transmissions, This applies to the 2500HD/3500 only, regular 2500's do not use the taller frame. When you look under a HD, the frame has the same gap between it and the cab as any other truck, thus the "body raise" is the 2" taller frame.
2500HD and 3500 use same frame but 3500 uses a heavier spring pack and heavier rated t-bars.
as far as difference between a 1500HD and a 2500 in NBS, I have no clue.