So I thought everything was fine. Wrong.
Started at the lake, ran like butter at the ramp. Drove about 5 minutes away and turned it off. Floated for about 5 minutes and tried to recrank. Turned over for a few seconds and then stopped. Couldn't get it to turn over anymore. Pulled the plugs and the cylinders are full of water. The oil is pristine. The water is in all cylinders, but mainly in the front two on each side. After clearing most of the water it never seemed to completely get it all, kinda like it was still entering however it's getting in.
Any ideas?
For those that haven't been following my story, the engine was rebuilt this winter. The block and heads have been fluxed. New guides and seats. Valve job. All new bottom end. New gaskets. 22 hours on the rebuild.