ok i have underdrive pulley on car now, ad crank ba;;ancer pulley over it, im puttin my paxton SC on, is there any way to still run underdrive pulleys? what do you guys suggest i think stock pulley/balancer is too big,...any aftermarket pulley/ba;ancer that will replace stock one?

 

You need to take the underdrive pullies off and put stockers and/or aftermarket ones on. It's that simple...