Yep, cabs are the same.
That's a sharp looking truck!
You have the somewhat unusual split bench seat.
Wheels look like 10 lug on 7.25" for 20" tires.
I would like to see more of the tandem setup. Looks like both are driven? is there a tag anywhere on the truck, like glove box?, to say the tandems are original or aftermarket and professionally installed, or are they cobbled together from extra parts laying around the farm yard?
Grigg