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  1. L

    Welcome, Legs

    I replaced the oil pan twice. I have a lot of crankcase pressure.
  2. L

    Rear Main Seal

    I have a 421 with 455 crank bored 60 over with 670 heads and flat top pistons. When idling, the rear main seal does not leak when I drive it, and oil leaks out of the seal. I do have a new PCV in the pan going into back of manifold. Has anyone had same problem and corrected the problem? I...