I don't know about the length but I have had good luck with GY belts. While I am not a GY tire fan, I would buy their belts and hoses. If they still have the warranty they used to have, and the belt fails while the original purchaser owns the vehicle the replacement belt is free. They seem to be good products.
Goodyear, Gates, and Dayco are all about to go belly-up. US manufacturers have had to pull as much cost out of their manufacturing processes as they can, resulting in suffering quality.