Actually I am running rear Diff lock where 8:39 is rear to find. However, 10:43 with diff lock is like diamond in coal mine. it is kinda not available ...... 4.3 is very good combo as vehicle gets light at high speed so one can get better avearage. at least 7km for sure.
I tried hard and found one rear 10:43 but front wasn't available at all.plus changing both Diffs with oil is a lot of money. i.e. around 60k for diffs and 7-8k for OIL. So I said to me "Chal ren de".