Blue smoke is oil
White smoke is water
Black smoke is fuel - too rich mixture.

Pull the plugs. If they look like they've been steam cleaned, you have water in the cylinder.

Make sure there isn't water in the crankcase. It will be on the bottom of the dipstick as a white blob or creamy coffee looking stuff.

Crack open the oil plug and see if water comes out if the radiator is significantly lower than it was.

Start it up and run it with the radiator cap off. Are there bubbles or oil or anything else in there besides coolant?

I'm leaning towards a blown head gasket but you'll have to check a lot more closely.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)