The Duratec 3.0L and the Yamaha 3.0L are in no way related. Also the duratec is a 60 degree V6 as the Yamaha is a 90 degree V6. IIRC the Yamaha is physically larger.
Just FYI, the SHO (V6 version) has been put in quiet a few cars, Ranger, Cobra REplica, Topaz, Feista, Windstar, Sable, etc etc. The engine bay in the C(SVT) is just too small.