I checked the glove box, but theres no data plate. Im guessing a 450 series is a 3-Ton but it doesn't say any 400 series anywhere on the truck. But it does say have 2 "3-Ton" emblems under the GMC emblem on the side of the hood. Its a Canandian built truck.
Basically all I have is the axle housing. Its a 12 bolt with 8 bolt axles. The differential cover, housing and differential is all missing.
Thanks for the help