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

I had a similar situation. Leaking WP on 67 cuda 273. Running a little warm as well. I installed a165 tstat(I think). Bought a new repop pump for 67.
NEW pump bosses for both the alternator AND ps pump were "off". I had to grind them to get them close to orig.
It throws off both alternator and ps pump pulleys. Be careful. If you can get it rebuilt I would. Or cleanup, reinstall and make sure to rtv bolts going into water jackets. Check timing cover for straightness as well.