Chrysler Marine engines

When I worked at a Chrysler dealer in 1964, we received a tech bulletin concerning oil leaks at the crank seal on 318s. Several reverse rotation marine crankshafts were inadvertently installed in car engines and because a different pattern was used in the knurling process, oil was being drawn out past the seal rather than forced back inside the engine.

Not sure if this was something that affects other years, but it was true for '64 small blocks.