George- YES it is true. I just started that process with my 65. The 84 C10 donor I had was exactly the same. I opted to swap in the 84 spindles (with 84 ball joints) since my 65 had nicer a-arms. Tie-rods are the same but the piece that bolts to the frame on the right side is different. Takes some modifying of the frame to get the steering box mounted.
