My base vehicle is an 18SS. I'm using an RC Solutions roll cage for extra stiffness and protection since I removed half of the top deck. From GPM, I have their center CVD's, rear shock tower, front and rear hubs, front uprights, and diff cases. I'm also using Mayhem 1/8 buggy shocks, because I bent two stock shocks and wanted something stronger.
I'm currently geared 52/15, but I think I need a smaller pinion.