Silly jokes aside, have you checked that nothing is seized, before
installing the new belt? That's why it might have broken in the first place.

I do have a suggestion based on my last weeks experience.  My 91 merc
tracer belt also broke because the air conditioner compressor pulley
broke internally somehow to cause it to seize.  As a side note, it is
50 degrees F up here, AC was not being used. There was no way to turn
the sucker without a large pipe wrench.

I found out that a belt from a NON AC car will fit right on the pulley
setup without any adjustments.  Just told my daughter she will never
have AC on the 91.

My recommendation. Check to see if the AC pulley can turn by loosing
the belt with a proper tool. Also check the tensioner pulley and power
steering for ease of play.  Heck, the belt is loose, check all you
can.
If you cannot turn the AC Pulley, purchase a non ac belt, install it
and all will be ok if you can live without ac.

I did have an opportunity to remove the Ac compressor from the car.
It was jammed solid and the pulley seemed to have worn to an extent
where the top of the pulley had worn a ridge into the compressor
housing.  Guess the bearing had been going for some time.

Dan.