There are lower gear sets available for the 8" Ford. I just bought a set of 3.80s and had choice of 4.11 and lower. They are aftermarket vs OEM, but they are out there. I found a whole reconditioned trac loc third member with the new gears on EBay. Paid $550, with 6 month warranty. I know I could have found used cheaper if I shpped, but the new stuff should be problem free,

Pat