Dunno what the complaint is . . Never seen a SBC that didn't try to leak oil . . unless it didn't have any in it . . And they're worse when they're cold and sitting . .
Honestly they can be sealed up, but it's another one of those things you worry about when you have nothing else TO worry about.
And you can keep it from leaking on the floor or Trailer with a small piece of cardboard . . . . Heh, heh . .