First couple parts you need to "source" are RC10 DS front/rear arms and rear bones. This will narrow the standard 10 to touring car width. Scour ebay, I am positive a full set of new arms are on there for $10 buy-it-now. The "real" DS also used a flat/narrowed nose plate, that will probably be a must have also.

I have resto-modded a few RC 10s lately (off road), and am currently revising a JRX Pro SE. I plan on racing at least 1 of my '10s and the JRX, brushless & lipo for both.

Good luck, and post pictures of what you have, and draw up some plans on what you want to try to accomplish with it.