General Maintenance & Repairs - GM/AC Delco alternator part number?

I'm trying to figure out what the correct part number is for an alternator for my 2002 camaro SS. I've searched and come up with the following 2 delco part numbers 321-1751 and 334-2486A.
Does anyone know what the difference is between these? The GM number is 19244783 according to my dealer, but this cross references to either of the above AC delco parts. Also, gmpartsdirect says it's part number 19152060???
I'm just looking for the stock/OEM alternator for my ride.
Thanks for any help.
:burn:

19244783

is that a reman?

http://www.ls1tech.com/forums/generation-iii-external-engine/1287967-fix-my-endless-alternator-failures.html

try this !!!