If the ball joints are still tight and have intact boots I often squirt grease into the boots with a needle attachment on my grease gun. You can put off replacing joints often for a good while.

Eventually you will have to replace them though.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.