For a truck with a 2# upper and a 2# lower?

Thanks

 

"This is from another post"

stock length-66"
stock lower/2.75" upper/stock idlers-65.5" belt
stock lower/2.8" upper/stock idlers-?
stock lower/3.5"upper/aux idler w/90mm and 100mm-69"

4lb lower/2.75" upper/stock idlers-
4lb lower/2.8" upper/aux idler/90mm and 100mm-68.5"
4lb lower/stock upper/stock idlers-67.5"(very tight)
4lb lower/3.5" upper/two 90mm idlers-68.5"
4lb lower/3.5" upper/aux idler/two 90mm idlers-69"
4lb lower/3.25" upper/stock idlers-68.5"

5lb lower/3.5" upper/stock idlers-68.5"

6lb lower/stock upper/stock idlers-68.5"/69"
6lb lower/2.7"upper/stock idlers-68"
6lb lower/stock upper/Aux Idler w/two 100mm-69.5"
6lb lower/3.25 upper/69"(tight)
6lb lower/3.5" upper/90mm idlers-69.5"

8lb lower/stock upper/Metco aux idler w/two 100mm-69"
8lb lower/2.75" upper/stock idlers-67"
8lb lower/2.80" upper/aux idler w/two 90mm-69.5"(tab removed)
8lb lower/3.25" upper/stock idlers-68"
8 lb lower/3.5"upper/aux idler w/two 90mm/tensioner tab removed-69"

10lb lower/stock upper/stock idlers-72"

 

I ran the stock belt on just a 4lb lower back in the day so i see no reason for the stock belt no to work on a 2lb upper and 2lb lower