the coolant passages in the reg are cast into the reg and is no way it could get into the reg unless the casting was compromised in some way, there is no gasketing for the coolant passages in a model J IMPCO Regulator just the fittings that screw into each end of it for the hoses.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.