I seem to remember people doing this so they could end up with a rally car. Check
www.hpiracing.com and look at the instructions for the nitro MT. I'm pretty sure that the bulkheads and drive shafts are the same. That means you could use the MT arms and shocks to make the conversion. You might need to cut up the chassis so the arms have enough clearance though. You might also check the HPI europe forums. There forum is like the old HPI forum where users can post Q's and answers like here at TC tech.