A very talented Russian builder has taken a 2003 Porsche Cayenne and replaced the factory engine with a Toyota V8. The engine is a 4.3 L 3UZ-FE and the transmission is a A650E five-speed automatic both sourced from a Lexus LS430. He was able to keep the 4WD by building his own connection from the transmission to the Porsche transfer case. So much effort went into this project that even the engine cover was kept after modifying the front and repainting it.
Builder being interviewed about the Cayenne (in Russian)
Source: Drive2.ru and Sokoloff Youtube channel via comment from Marat
How much did this cost in $US?