Was using my '52 8-N yesterday and as i was coming back to shed it dropped off on two cylinders but had no smoke or unusual engine noise at time. This morning started it up and still two dead and shortly after (10 sec.) started white steam smoke. Shut it off, pulled two front plugs and see they are wet with antifreeze. Pulled rear two plug wires off and with front two plugs out crank engine. Cylinder or cylinders full of water......not talking a little but full gush of water from plug holes. Can i think head gasket or sleeve problem?? No noise, no water in oil, just water from plug holes. I know head must come off so do i need to pull all sheet metal and fuel tank to get to head easier or will it come free of everything and come off without doing this. Going to get on it tomorrow but cant get too torn up as i have known this tractor since new, from original owner and with just over 1000 hrs has never been apart. Thanks for advice.