Some front end questions

Hey y'all, so I learned awhile back that my car was originally a power steerling car, converted to manual steering probably when the previous owner swapped in a 318 in place of the /6. When I tried replacing my Idler arm, I learned that an Idler arm for a 1973 is the wrong part, it required the older style Idler arm. I also learned, after just doing my transmission, that it is a 1969 transmission. My guess is they had two mopars, this dart and a 1969 mopar. They must have swapped the engine, trans, used the steering gearbox off of the 69, the pitman arm, center link, and idler arm. My question is, what else is there? I plan on doing a complete front end rebuild. I want to replace the idler arm (again, I want a Moog idler arm…) the pitman arm, tie rods, strut rods, ball joints, torsion bars, shocks, rebuild the gearbox, and all bushings. How much of that would be 1969, and how much of it would be 1973? I already know the idler arm was 1969, so that means the center link, pitman arm, gearbox, and tie rods (maybe?) are all 1969, but would there be any difference in ball joints, control arm bushings, or anything else I should know about?