8.25 suregrip

Does anyone know if this suregrip unit will accept lower gear ratios like say a 3.55 or 3.91 etc..? I found out that a 2.45 gear ratio is different and will not accept those gear ratios. All I know is that it came out of a Dakota with a 8.25 rear and 27 spline axles. I would be putting it in a 84 Dodge Truck. Thanks