Sure Grip conversion

If you really want to do this, the 7 1/4 is built by Spicer, but I don't know what Spicer series they are, which normally carry numbers (like the famous Dana 60) such as 25, 30, 41, 44, etc. I don't know if stuff like the Jeeps ever used the same axle splines, but if they did this will widen your availability for various types of limited slip devices.