both sides. but thats because the water is in the intake.
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Find or borrow another intake and put on. Sure used right intake gasket and everything lines up correct? Gasket didn't move on installation
A 2 piece intake with a plate can not suck oil in to the ports. Is this blue smoke or more like white steam that dissipates in the air?? Fill radiator pump up a few times, pull the plugs and crank it over watching for water to spray out spark plugs holes. Sounds more like a possible ring seal problem to me though if your actually seeing blue (oil) smoke.
Your problem most likely is in an intake port, epoxy in it that came off or ported into a water jacket that finally gave way. Sleeve or head gasket problems would connect cooling system to combustion chamber or crankcase. No water in oil, correct?