Water leak from block on 403 engine

[mikebro]

Just started cleaning down the engine on 403-1402. To my horror I have found a hole in the block casting on the RH side at the front, just round the,corner and below the water pump. Presumably there must be a waterway only just beliw rge surface. Is this terminal or can it be repaired? Looking back further a long the RH side of the block there is also a light wetting underneath the paint. Is all this something that others have found?