Alternator Pulley Size

[Badaxe]

So as I'm leaving the neighborhood to go see my brand new grandson(born an hour before) I hear and feel a large clunk in the front left corner. The steering goes away and as I'm making the u-turn realize that the brakes are gone too. After limping it back to the house I pop the hood to find the alternator sitting on top of my steering pump. Turns out the bracket off the rear of the tension pulley snapped which in turn completely tore off the large ear of the alternator. So the bracket has been repaired and the alternator replaced. My question is..........how big is your alternator pulley? The pulley on the alternator it came with is 2" across(possibly an HO alternator he had several TVs and a sound system) it died and I replaced it with the now broken one/ new one that came with a 2.5" pulley. Thing is I've got to really work the tension pulley to get the belt on. All replacement parts are for the "6.5 application". I'm sure I'm stringing it the right way and know that a longer belt would work, but is it a pulley issue? Obviously the smaller pulley will spin the alternator faster but what damage might ensue?

 

[NVW]

The wrong pulley will give your tach the wrong reading, the tach gets it's signal from the alt. I think the correct pulley is about 2 1/2"

http://www.thetruckstop.us/forum/sh...-stumped&highlight=alternator+pulley+diameter