As late as I am to discovering this, I have learned that the s550's 8.8 rearends come with a 34 spline differential (WOW) 
Which makes me wonder could the differential work for solid rear axles of the previous years? Yes I know your gonna need custom axles and yes that sounds expensive, but you can have custom axles made for 350-500 bucks. Comparing the differential of the s197s and the s550 they do look very similar. Tell what y'all think or know on regarding these two diffrentials, thanks
Which makes me wonder could the differential work for solid rear axles of the previous years? Yes I know your gonna need custom axles and yes that sounds expensive, but you can have custom axles made for 350-500 bucks. Comparing the differential of the s197s and the s550 they do look very similar. Tell what y'all think or know on regarding these two diffrentials, thanks
