Hi guys got some more questions regarding this thread: My 427 block info is very similar to what has been described above, except for the fact that my block does not have any ribs on the either side. Also it appears to be a side oiler, complete with
oil gallery. Does anyone know how you can tell if it was actually drilled as a side oiler and not a top/center oiler? And if not, what needs to be done to the block to make it a side oiler? I was told it was a 1970 marine or service block.