Went over to Stephen Dubovsky's house and had him mess around on his lathe. After a short while of goofing around, I now have the temporary coolant plugs to block off the heater core hoses. Long term solution will be to block off those hose outlets at the head, etc.
These just look real pretty. We even did the "grooves", chamfered the ends and rounded out the grooves so there werent stress risers.