All LCA's '65-'73 on C's are the same. You already know the deal on the ball joints.
I am in the process of doing the same thing on my wagon, the front end is TOAST, so I had a friend who has access to a machine shop press install upper and lower control arm busings in an extra set of arms I had here. Now if I could only find some time to get ot the swap...
Brian, the only difference on the 4 piston brakes between C's is the manufacturer. The B body used a Bendix system, the C's '65-'68 used the goofy Budd system. Neither are worth saving IMO, swap to the later stuff, usually better braking and much cheaper parts.