So I am in the midst of my first axle swap since I chewed up the gears in mine. I have a 14 bolt 9.5 in it and purchased a 14 bolt 10.5. When I was measuring some things up I noticed the leaf spring searches are different widths. Where is a good place to get New perches? And I was told it has 4.10 gears. How do I tell if it does or not?