69 control arms?

[GMC70c20]

i did a post similar to this a little while back and found out that 67-87 3/4 and 1/2 ton upper control arms identical but lower control arms are differnet do to ball joints (other than that athey are also identical). Gm changed the design of there spindles in 73 to a shorter version so they used taller balljoints, and they also changed the tie rod diameters and lenghts.