Posted in the Forced Induction forum by kerrychin:
The article from Road & Track says:
"Take the engine, another Ford/Yamaha joint effort that's a marvel of compactness and refinement. The steel-sleeved aluminum powerplant is space efficient out of necessity because, according to product design engineer Ted L. Byers, the V-8 had to be designed to fit the Taurus' V-6-size bay without changing any sheet metal. It's based on the Duratec 2.5-liter V-6 and shares its bore (82.4 mm), stroke (79.5 mm) and bore spacing, as well as its pistons and connecting rods. For extra rigidity, a stressed aluminum oil pan bolts to the underside of a girdle that supports the crankshaft's main bearings and forms the lower part of the block "Everything from the head gaskets down is Ford," beams Byers."
Kerry
So, sounds to me like Yamaha did the heads, and maybe the intake (?) as well, but Ford designed everything else.
