As I aside before front CVD's are a must for high angle applications.
There is a "Sakura D3 Mod" for the sprint 2. What it does is replace the stock A-Arms, steering knuckles, C hubs and steering bellcrank to parts from the Sakura D3 to get 50 to 55 degrees of steering angle.
I have no clue how to do it, but I'm sure some googling will fix that.
OTA-R31 w/ Flux Capacitor