All cylinders filling with water

just thinking here but you might want to pressure test the cooling system before you fire it up tomorrow after the heads are torqued down . do it with the spark plugs out so if its still leaking into the engine you know before it hydrolocks and causes expensive damage .
If you dont have a cooling system pressure tester last i checked they can be had at harbor freight for $35-$40 . much cheaper than destroyed engine parts imo .

Putting pressure to the cooling system has been brought up, but if it was me, i'd button it up and with no oil, leave the pan plug and spark plugs out, fill it with water and hit with 20/25 lbs. and wait a few hours to make sure nothing shows up. Last thing you want to do is rotate that assembly anymore then nessesary if things aren't right.

I can't see a good reason NOT to do this, at this stage of the game.