Yup. You'll need the steering components also. If you don't have the chassis already, it's probably not worth trying to convert it. You'll pay the same for an Evo III as you would the chassis alone.
Yes, it can be done, you will need the top and bottom plates, center piece, battery side plate, and the new battery strap. I bought all the pieces and just removed them tonight to revert back to the tub chassis. No steering components need to be replaced, I can send you pics of all the parts you need to guide you throught the process
I made my Surikarn into a wicked looking TB-02r with all of the red bling. Hey Gus, can you use the Evo steering on the TB chassis, I thought it was missing one of the tapped holes? Throw some pics up so we can see it