I was struggling trying to tighten the alternator drive belt using a pry bar to put upward force on the alternator and decided to try something different and rigged up a small ratchet web belt to do the tightening job.  The ratchet belt proved to be a great way to put upward force on the alternator while freeing up my hands to tighten the fasteners.  Below is a photo of the setup I used.  The ratchet belt can be purchased at any hardware store for about $8.