control arms

I have a 68 Dart. I also have some upper and lower control arms, strut rods, spindles, etc from a 73 Swinger for a disc brake conversion. I wanted to pruchase ur products but don know if I need them. I basicly want my car to handle better, so would you suggest buyin ur lower control arm and strut rods then keepin upper a arms but replacing the busings?

Jason