'94 TBird LX V8, 67k mi.

When I start it in the morning, I hear a very hi-pitched whine/squeal from
area of motor while car is parked. Been going on for quite some time.

I've replaced the belt-tensioner and idler pulleys. With new bearings in
the pulleys, I guess it's more-or-less gotta be the alternator.

I put a long ratchet extension on alt. housing, open end in my po'
ear: I do hear a grinding-like sound, but ...

Any way to confirm it's an alt. bearing?

If it is, how to proceed? Practical to rebuild my-own-self?

Etc, etc.

 TIA,
 Puddin'

" ... and the bees made honey in the lion's head."
      - from "If I Had My Way", Blind Willie Johnson