The 52 supplement is 15 pgs. It's at the end of my hardcopy 48-51 manual. Included are, lubrication (no big news) cab&body (mostly door info concerning the push button handles-remove/install/adjust),rear axle, brakes, engine (pcv/carb/cooling system now has 4#pressure cap) tranny. In fact a lot of this is covered in the 1954 truck manual. Except for the Pvc info that I didn't see I don't think you're missing much.
