Insane engine swap: V12 1GZ-FE in a Lexus IS200

Event: International Toyota Treffen 2012 6-8 July A Toyota Century engine in a Lexus IS200 Car is not running perfect Exaust has to be changed to a double 3’ exaust, engine can’t rev higher then 4500 rpm at the moment and some minor wireing tricks has to be done for the check engine light