To start a project rig you have two choices: start with a pile of parts and assemble it, or start with a complete rig and disassemble. We chose option two, but first we needed a rig. If you are wondering why we would start with a brand-new '03 Chevy Avalanche 2500, consider that it has an 8.1L engine and a 4L85E electronically controlled four-speed automatic. In addition, it comes with disc brakes on its full-floating 14-bolt rear axle, and rear leaf-spring suspension and independent front suspension. Even with all these great things we felt we could change a couple of them for the better.