I have been doing some research but am unable to find the exact size. I am in the process of swapping out my eaton with a VMP 2.65 with a 3.3 pulley. I will also be putting on some billet flow idlers (1-92 & 3-100). I've been told the gates green belt is the way to go but I am not sure on the size of belt I need. Looking at a few websites I am thinking a 76.5 will fit. Can anyone confirm this? The lower pulley will remain stock.