I have a 2002 F-150 Supercrew with a few street mods. I now want to change the differential and gears. I currently have an open differential with 3.55 gears in a 9.75" rear end. When looking at aftermarket limited slip differentials and gears, I did not expect to see such a large price. This got me wondering if I could purchase the same Ford setup as the lightnings and harleys (i believe they both have limited slip, 3.73, 9.75" rearends). Just wanting to make sure their set ups will work for me and if anyone has any idea of the cost, (parts only). Thanks.