Blow by question

Don't just put down a bead of rtv and expect it to seal. Clean the surfaces real well and put down your cork gaskets and use a thin bead between the cork and surfaces. Also put a thick bead on the sides of the cork gasket and smear alittle around the water jacket ports. Let the silicone dry for a day or so before you crank it. As for the oil bubbles you may not have square surfaces on your intake so make sure you torque it down and then a quarter turn.