From RTKILLA's autozone post, I found:

4080990 and
4081000

Which one fits best? And is it made by Gatorback?

Putting together a little 'road kit' to have just incase anything pops, snaps, or catches on fire..........

 

Goodyear Gatorback belts seem to be a popular Lightning upgrade. They are
claimed to be much quieter and long-lasting that the competition. They are
available from Autozone online for about $24-29 each. The part numbers are:
4080660--stock blower belt

4080675--blower belt with 4-6lb lower pulley

4080990--accessory drive belt

 

i have a 99 and the 4080990 would not fit ,too tight. i bought the 4081000 and it fit exactly like the stock belt. i crossed the ford belt over and it was actually 99 3/4 " long. i put a 4080990 on my freinds 2001 and it worked fine , just really tight.