I believe I have the cover you posted, which is actually a replacement cover that Mopar made in the late 1970's for the '68 and earlier engines. It incorporated the '78-up design where the seal can be replaced without pulling the cover off. The original early covers had to be removed to install the seal. Unless you need the early design for originality, the later design works just fine.....as does the '70-up cast-in cover which is easier to find.