Yep I rebuilt the torsion suspension on a 68 W900 when I was 20-21. Still Have the truck in the shed. Pins, bushings and wood bearings. I think it took me a week. we didn't have very good air tools back than.
They did have good traction in snow, but the empty ride wasn't to great. I believe it had the heavy bars. 44,000lb. 46k maybe? Rode good if you were 90,000 gross.
I think the orange one is just like the 68 W900 I have. Are the white and black ones C500?
Well, It does look to have a shorter hood than mine. The front of the cab is not that far forward on mine. I think it starts behind the front fenders not between them.