I have a set up 5.29 third with a welded diff. I have ran it for a while and it is well set up and has been dependable. I have this one in my front end but I just broke my rears. I have wanted to switvh to a higher ratio since my 3RZ swap. I could ship it to you in trade for both your 4.37 thirds shipped to me. I know that doesn't help on your 4.56 thing but that's what I have to trade and I am intersted in getting some 4.37s...