exrodder Tom I have 2 ideas. Go out and get 2 intake gasket sets. and High tack them together. High tack both sides of the graskets and assembly and tork to spec. Before you do this, try a pep boys or auto zone and ask for leak dye checker. If they don't have it try matco tool man or Snap on. They have a kit for 65.00$ Run the motor and put the dye in it. Idle it till it smokes good. Turn it off and pull the intake, look for the stain with the black lite. It will show up inside the manifold runners if the
oil is leaken it or around the valves if coming down through the valve guides. Was the angles checked on the heads and manifold to see if they are correct to seal properly. Does your motor have low tension
oil piston rings? They maynot be seated yet. Good luck Rick Lake