Maybe this is a stupid post, but I hope it helps someone else who doesnt know this.
SO:
I started to do some research on the 3rd gen CS-144 GM alternator upgrade(OEM to 140amp). I went as far as to go to the junkyard and pull one off of an old Camaro. I even ordered the plug adapter. Then I stopped dead in my tracks because the most frustrating thing I ran across every time I tried to determine what belt to use was "get a belt that's 1-2 inches longer than oem".
Now, I could be the dim bulb on the tree here. The ironic thing is I never made any more progress because of the fact that I felt like I would look like an idiot walking into an auto parts store, then holding my belt up to the guy behind the counter and saying "Can you find me a belt that's 2" longer than this?". Not to mention trying to google and find the length of the OEM belt was a fruitless venture.
Fast forward to my new side job at Autozone. Whilst stocking belts in the back one day I ran across this wonderful device:
This big boy measures the belt down to the millimeter in a matter of seconds, which *CAN* be cross-referenced in the computer to find something of similar profile and length. I hope this helps someone else. I plan to resume my project soon now.
TL;DR - Go to the autoparts store and ask for a 2" longer belt. They actually can do it.