Since these cars have only been out of service for a short time (less than 20 years in most cases) used parts are in better condition and their sheer numbers mean prices are still affordable. Whether you're searching the pick-a-part looking for a spindle or 10-bolt rearend, an overdrive trans or a set of control arms, you can pull them from an Oldsmobile wagon or a Buick Regal coupe-it doesn't matter. As confusing as it is that there were dozens of G-body models in several configurations, the important thing to remember is that under the skin all the suspension, chassis, brake, and driveline components are interchangeable.