How do I change the front cv axle on a 1987 plymouth sundance?

Remove the wheel, the brake caliper, and the brake rotor.

Remove the large spindle nut that comes through the center of the wheel bearing assembly.

Remove the bolts (usually 3 or four) holding the wheel bearing assembly on. You can access them usually through holes that are in the spinning part of the wheel bearing assembly in between where the lug nut studs come through)

Sometimes you need a wheel puller to get it off ones the bolts are out, but not always. They can be a chore. My advice is to rent the wheel puller from auto zone.

the CV half shaft should be loose now, just yank it out.. pop the new one in making sure that it seats completely and firmly.. then reverse the order to put it all back together, and done.

Good luck