Marine 273 build

One thing I didn't see mentioned that some folks might not be aware of...counter rotating crankshafts are different than those in cars. When I worked at a Chrysler dealership, we received a bulletin that a few hundred 318 marine cranks had been inadvertently installed in car engines, resulting in excess oil consumption. Apparently the knurling is different and instead of forcing oil back into the crankcase, it draws it out past the rear seal.