Getting back to your question. No, not if you get the special tapered shim to slide over your exiting upper ball joint shaft so it fits tight in the 1973+ spindle hole. I think Dr Diff sells them. If you decide on a later UCA, consider the after-market tubular ones. They aren't terribly expensive and besides adding visible bling, they let you better adjust the caster for today's radial tires. Otherwise, you probably need special Moog offset bushings to get proper caster and camber.
