[FED 387]

Years ago when we had porosity problems while running aluminum Oldsmobile small block heads in Modified we encountered weeping or sweating-- our solution was to use either Alumaseal the powdered stuff or something called "Water Glass" or sometimes called "Sodium Silicate" I think is the actual name for it--we got that stuff from a Pharmacy !! The farmers used that stuff on chicken eggs before refrigeration and would dip the egg into and could leave it on the kitchen counter for a few weeks and the eggs would not spoil---Not sure how bad your situation is but both methods either separately or together solved our problem. BUT before you go into tearing it all apart you might give it a try. Good luck interesting build have been following it and wish you well