Off-Roader, I just replaced both on my buddies 91 RS and it was cake. He bought them from Advanced Auto for $21 each. You don't even have to remove the shoes to just R&R the wheel cylinders. The brake lines were the toughest part of the job. On the Drivers side you have two brake lines going into it, loosen the top line first, then the bottom. Remove the two retaining bolts then whack the wheel cylinder with a rubber mallet a few times. Have a buddy hold out slightly on the shoes and the cylinder slides right up and out. I did both in about 40 minutes (25 minutes for the first, 15 for the second). When you do the passenger one, also remove the bleeder screw (both removing and installing).