All cylinders filling with water

I guess I'll jump in here on this and say that I kind of doubt it's head gaskets being blown. No way. Yeah, maybe on the dowels or stud length, but I dunno.....I'm sort of leaning towards that intake a bit, like was the intake milled to match the cylinder head amount of milling? Were there any traces of coolant in the intake ports or intake manifold plenum or runners?

Having coolant in ALL 8 cylinders? That's a trip!