If you're going to replace the rear control arms, I suggest you go for replacements that have a spherical bearing at one end so that the rear axle can pivot freely without inducing suspension bind. They'll alllow more rear tire grip when cornering and when exiting from a corner 'cause the inside rear wheel will stay firmly planted.
For that reason, I have the Maximum Motorsports lowers and Edelbrock adjustable uppers. They're not cheap but IMO they're worth every penny.
