Frame differences ?? 1 ton vs. M880 series

Hi all,
Anybody happen to know if there is a difference in the frame on the M880 series and a civilian 1 ton Dodge ? Mainly referring to the thickness and height of the frame rails. I realize that bolt holes, brackets, etc. would be different, but am largely referring to the strength of the frame.

Thanks,
John

Might be. The M880 frame is identical to the W200 3/4 ton frame.