So after trying to use the Gatorback belt and stretching it the best in could trying every possible way to get it on I decided to try the $16 Duralast belt from Autozone. Went on like a facoty part. I checked the part number on the Gatorback belt and it was the right one. I checked the Gatorback vs the stock belt vs Duralast belt. The stock belt was 1/2" larger than the Duralast. The Gatorback was 2" shorter than the Duralast. It says it's 83.5 inches, but it isn't. On the bright side, the new Duralast belt cured a terrible whining noise when the A/C was running.
Sean