That looks like a nice truck to work on. The 1/2 ton in those years ha d a completely enclosed drive shaft but the 3/4 had an enclosed extension to the transmission and then a two piece open setup. The 1 Ton had a completely open driveline.

If you look in the gallery, John has an update to his bigbolt project. He has some nice photos of a factory bed.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!