Leaking water pump... But not at weep hole.

If you have to add a pipe bushing to the larger bypass hole, it will change the height of the nipple. Thus altering the bypass hose length may be req'd.
I bought a new bypass hose too when I did the water pump. The one on the car had been trimmed to fit because a bushing had been used. I had to trim the new on too. Just slowly remembering details. I guess you know to put a piece of heavy cardboard or something in front of the radiator. Slightest bump from a fan wrench or anything can knock tiny hole in these fragile old radiators.