FrogFab is now manufactering HD doubler kit for jeep or buggy.
Will fit with any 231 case and any input 231 shaft.
Come will complete head threated HD output shaft that replace the dana300 input shaft.
Just have to cut your 2.31 and weld the side side on it or use JB weld to fix it.
We have sold more than 20 kit localy since a couple of year and we now sure that every one will like our DIY kit.
Start price for first mount 580$ shipping include to all lower state and canada