According the Indmar Engineering Departement
Ford produces several versions of the 6.2L engine; Super Duty, export versions and previously the Raptor SVT. Indmar selected the best components from these versions (heads, cams, intake manifold, bearings, etc.) as well as designed some Indmar specific components, such as the oil pan and oil pickup, to create the configuration we offer known as the Raptor by Indmar. This is not simply the standard super duty truck engine that gets a few marine specific parts bolted to it. It is an engine built by Ford and marinized by Indmar Marine Engines.