i have 489 case open... how/what do i need to make a sure-grip?

another question is, would a 72 8.75 340 car have a small yoke or large yoke. there is a suregrip that was just listed for sale, but i do not know if it will work with my driveshaft.


the cups on my universals are 1.06" i believe,,,,,,small or large yoke?
It will work.If the yokes different count the splines and get an aftermarket yoke to fit your application. Many vendors sell them.