Just spoke to Tech. Person at Jegs. -- The 87 thru 90, 5 lug axles are 27 spline.. -- My 93 (Dakota) may be 31 spline. If so, this makes the switch difficult, and expensive. - This is a 8-1/4" rear ---- - According to The NAPA Site My 93 is 27 spline. ??? ---- Does anyone have info re this ?