Well It Leaks AGAIN!

So true. You can replace main seals until you turn blue in the face, but you are wasting your time if the sealing surface isn't right.

I will look at the surface when we have it apart but this is a fresh engine (700 miles) with a brand Molnar crank in it. I am betting that my PCV system (stock style with a breather) isn't up to the task of a 418 stroker. Anyway you look at it the main seal has to be replaced do the engine has got to come OUT AGAIN aaaaarrrrgh.