Hey guys I need some help. I just bought a 6# pulley, and it came with a Gatorback Belt p#- 4080700. I have the stock pulley on my blower, and all other pulleys are stock as well. According to troyerperformance.com this belt is 70in. Then i went on lightningforcepreformance.com and looked at there belt lenght chart. According to them I need a 68.5 belt. The Gatorback belt for 68.5 p#- 4080685. Does anyone know from experience which belt I need for this set up??? Any help or advise is greatly appreciated!!!!