[Rory McNeil]

I have used 5.13 gears for a Ford 8.8 from both Moser and Motive. I wish "Pro" gears were available for a 8.8, but I am not aware of any, I have broken 2 sets of the 5.13s in my stick car, the 4.88s I currently have in the car seem to hold up much better than the 5.13s do. With an automatic, the 5.13s should last a good long time. I am not aware of any ratio between the 5.13s and 5.71s Mark.
As for the C Clip eliminators, I have had the same set of Moser 31 spline axles and C Clip eliminators on my 85 Mustang for 10 years now, no leaks or any other problems.