TRhe 200 uses diffrent pistons, cams, lower and upper inlet manifolds, throttle body, airbox and exhaust.
The manifolds and throttle body can be found on EBAY quite often..
If you want to chat about them feel free to give me a ring on 07816 165711.
The estate has been rolling roaded at 243BHP as opposed to the 202 standard and then 167 that the ST24 and standard V6's push out.
Jeff