i currently have a 8.5 gm rear with newer eaton posi and new richmond gears it has stock axles . my car is running low 11s with a 1.7 sixty ft im thinking its time to upgrade to a better axle but not shure what i need ? i read alot about the 30 spline axle but then id have to change the posi unit to right ? is there a big differnce in stenth between the 28 and 30 spline axles
