Front "China wall" sealing issue on SBM

Even if the engine has some blow by the PCV system should handle it. It look like you have a lot of pressure inside the block to push that much oil out, that high in the block. You might want to see how much vacuum you are getting from the PCV. The inside of the block should ideally have a slight negative pressure from the PCV system, at which point oil wouldn't come out even if there was a slight leak in that seal.