To answer that question i never really paid attention to LCA shaft designs when pulling them out of wrecking yard cars.
But the "ball" machined style are found on the early year cars, then the other style, either with the drilled hole for a castle nut, or for the lock nut style started.
But officially, who knows what year?
But, most likely what machine shop(s) had the contract with Chrysler Corp. to machine those LCA's, for Chrysler.