The Ford 500, Freestyle (formerly known as the Cross Trainer) and the '04 Windstar/Monterey will all use the the new, Cyclone V6. The 3.8L (when is the head gasket going to let go) dies. This engine (I beleieve) is 3.5L, 4 valve, DOHC with Variable Cam Timing. I'll see what I can find out about block/head compatiblitiy with Duratec.