Originally Posted by
Redback
Initially you shouldn't need to change the rear roto flex to fit the locker, as long as you don't shock load it hard and often, but it should be done sooner rather than later, never heard of changing rear to front, early D1 flange and uni is the go when fitting a rear locker, front doesn't need changing.
Second I'd go the rear locker first.
Third do you have upgraded axles, because you will need them, especially if you decide to run a front locker first and 33s, also I'd be looking at heavy duty CVs as well, a front locker on it's own and 33s, you will break an axle or a CV or both.
Baz.