Mondial Alternator Belt Question

I am getting into another belt service on my '87 Mondial 3.2, and thought to ask this time around about the alternator belt. It is really, really tight--to the point that I had to remove the pivot bolt and move the alternator in to get it over the pulley after I ran out of room on the slot with the pinch bolt.

There is actually a lot of room left that I could move the alternator out to tighten the belt, which makes it seem the wrong belt on the car. I called Ricambi where it came from and they confirmed it is the correct part--10mm X 800mm.

I don't know if the pulley and / or alternator may have been changed in the past such that it is somehow different from stock.

So the questions are:

1. Is it normally nearly impossible to get the belt on?
2. What should the diameter of the pulley be?

Thanks in advance for any insight.

 

Thanks for the responses. I just wanted to get a sense of how difficult it should be. I got it off by putting a screwdriver under it and turning the motor with a wrench. (and it wasn't so tight it took much effort or raised concern of damaging the pulley, I just had to lift it over the edge) OK for a belt I'm getting rid of but not what I want for a new one.

I can get an industrial 10X850 belt, which I may try as an experiment. It really seems like the 1000mm would be too long, but I guess that is less than an inch added to the circumference. I assume it would take a narrower groove though so perhaps it would be obvious from measuring the width of the groove.

Thanks agaion..