They don't make a 1/2 ton Crew Cab truck.
But I just did. :P Stay tuned for pictures..
I used to have a '75 C20. The only problem was it rode like a truck. It needed tons of weight in the bed to make it nice decent.
1/2 ton trucks are more passenger oriented and ride much smoother. Also, most of the suspension products are for C10s.
Besides, I don't want a 8 lug 22 inch wheel