Seems you and Charlie think alike, he mentioned that also. Don't know if I'm really a fan of such additives, as I beleive a problem like that should normally be mended by replacing whatever is broken.
My fear is that the water pump mount on the block is cracked, which would account for 3 chewed-up belts since I've had it. A crack in the mount/adapter would possibly give enough tolerance, so that the pump no longer runs true to the other pullies and eventually fries the bearings and snaps the belt.
Found numerous people on Pennock's describing the the identical issues.
But in either case, you're right, the motor needs to come out, which I'm not capable of doing on my own. Like I mentioned before:
I'm smart enough to know how dumb I am.
And I'm still waiting on either Ashby or his son to get in touch with me, but I've just about given up on that. I'll try to find a local shop that's willing to do the work.
\D