Belt Size Question

[white03svt]

New guy here, I searched google and this site for the belt size I need and now I'm not sure what I need. I have the following setup and am changing the alternator pulley to a 3.2". Thanks in advance...

Upper pulley size: 2.760
Lower pulley size: Stock
Size and quantity of idlers: 2 100mm & 1 92mm (Billetflow)
Auxiliary idler pulley : 100mm Billetflow
Alternator pulley size: Stock
999

 

[lobra97]

http://www.metcomotorsports.com/supercharger_belt_length_recommendations.htm

http://www.stangshiftergaskets.com/belt_length_chart.htm

 

[white03svt]

From that chart it tells me to use a 74.5 + 1" (for the 3.2 alt pulley) = 75.5" belt?

 

[whitedevil95]

So its a BF 2.76 and a full BF idler set? I ran my stock length belt for that. 75.1 i think. But it was the stock length. Worked great.