Okay I've got the picture now,I haven't seen this yet(water pump) so was asumeing it was the heater hose barbs. What size hole are they? If you have or can take the pump off you could tap (not retap) the hole ,and maybe go with something from Earl's. Sounds like GM got cheap and screwed-up again,or could they be sweat sodered and it just broke loose? Either way the JB should hold fine. Sorry for the confussion,but that's how we learn.