All cylinders filling with water

If all 8 were full, I have a hard time believing it was not hydrolocked.

Did you verify that the head bolt holes were clean to the bottom with no oil or coolant in them when you torqued your head bolts?

I was thinking the same thing. I know from experience with power boats, a cylinder even partially full of water will do irreparable damage on a compression stroke. I can't imagine what the internals would look like with water in all 8.

Good luck.

Russ