a little help needed here, I was doing the oil mods on my 430 and I didn’t notice I broke through the outside wall of the block. Can this be repaired take a look at the pictures and let me know thanks in advance.
Yes. Read up on Jim's "how to" on the oil mods. http://www.v8buick.com/index.php?threads/400-430-455-block-id-prep-and-oiling-mods.214613/
Yep, what Derek said! I did that same thing years ago doing a timing cover, same procedure as Derek said, worked great. The upside to what happened to you is that passage is a suction passage, its not under 60/80 psi of oil pressure. The thing that's always had me puzzled about doing that, is I would think the drill would follow the cast in passage very easily, and not wander off, unless the passage was cockeyed to begin with
