Get the Hyperdrive R5 lower arm mounts. This will allow you to fit the Associated R5 front end, which is very easy to set up. I've got a set on my V-Dezign CR4.0. Works great.
1/12 V-Dezign Carpet Ripper 4.0 / GM Genius 75 / GM Pro 10.5 metal / LRP 5400 50c
1/10 Tamiya 414JJ / LRP Sphere TC Spec / Nosram Storm Evolution 10.5 / CS 5200 50c saddle pack