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Cucv military trucks were rated at 1-1/4 ton, used same 1-ton frame civilian trucks used. Your frame is fine. Add a few more crossmembers and bolt on a few frame stiffeners if your really worried. Frame stiffeners can be made from 2" angle iron.Sent from my SM-S920L using Tapatalk
Quote from: 1967KaiserM715 on January 11, 2018, 06:58:59 AMCucv military trucks were rated at 1-1/4 ton, used same 1-ton frame civilian trucks used. Your frame is fine. Add a few more crossmembers and bolt on a few frame stiffeners if your really worried. Frame stiffeners can be made from 2" angle iron.Sent from my SM-S920L using TapatalkThe M1008 & M1010 are 8800 GVW with open Dana 60 Front axles and NP208 transfer cases.The M1028 & M1031 are 9400 GVW with Limited slip Dana 60 front axles and NP205 transfer cases.The M1008 is just a 1-1/4 ton pickup with the standard CUCV package.The M1010 is a CUCV with a tactical Ambulance box mounted on the frame.The M1028 had a slide in tactical box The M1031 had a frame mounted tactical boxBoth the M1028 & M1031 had pintle hitches to tow big heavy things like the military generator sets.They were all based on the 1984 K30 chassis with uprated springs and heavy brakes. None of them had boxed frames.I have seen CUCV trucks with Dually rears but IDK if these were A2 A3 etc variants, a handful of motor pool modified chassis, or modification after they changed hands to civilian ownership. Knee jerk says the civilian owner decided they wanted a dually.
I would ask you, how would boxing the entire frame benefit your pulling and braking if that is what your concern is?
If you boxed the entire frame, it would be heavier, have an uneven temper and where is the structural weak point now? What would be the gain in towing and braking? I don't think anyone can answer your theoretical question unless they have an R&D lab to give you the outcome data.