I did mine in a saturday afternoon, but that was using a mates press to remove old and fit new. Check the bushes on the other end of the A frame too as they also wear and if the ball joint has gone they probably have too. You need a press for them too. If you can't get the ball joint out of it's taper we found a small scissor jack between chassis and a frame and some bashing on the ball joint with a big hammer worked.
It transformed the motor doing it though, clunks all gone, cornered better and drove in a straight line. Also replaced tie rod bushes to remove all of the rear wheel steer.
graham