Yes, the 10-30 cabs are basically the same as the C40-C80 trucks. The main difference is the front fenders and the grill shell-radiator support. The doors, hood and cab will swap. Some of the bigger trucks may have a different bolt-in floor hump depending on what transmission it came with. I think the outriggers are in the same place on 60-63 pickups and big trucks, but on the 64-66 trucks the outrigger locations are different between pickups and big trucks.
There were also the "L" series big trucks known as the low cab forward trucks which looked very similar, but the hood is shorter and the doors are different.
64 L60
65 C80