Here is something to chew on.
Alignment Solution for Installing a Late Model Rear End in a 1947-1954 Pick Up

Also 1955 Chevrolet Truck 1st Series Vehicle Information Kit--- Rear Suspension, PDF page 83, sheet page 140
1955 Chevrolet 1st-Series 1/2 ton truck had open driveshaft, on same frame as 1951 1/2 ton truck.

Why do you want to get rid of the torque tube?