Engine Problems

[MacQuigley]

My dad had just started stripping the 350SB that came with my C10.

On taking the sump off he fount it full of water, and I mean full over 1 gallon of water in it.

Both us are racking our brains to come up with a way that much water could have got into the engine without there being a crack in the block somewhere.

Has anyone ever come across something like this before?

It would be a shame to have to scrap it as otherwise it seems to be a nice block. It a 4 bolt main block that has obviously seen some work done on it as its over bored and fitted with high compression pistons.