Swapping the solid rear end from my new edge mustang to an IRS , took it to the alignment shop several times and it just couldn ' t be dialed in , it kept eating tires and bearings , also had to replace both hubs . I bought the rear end for $ 1200 , and spent about the same amount modifying the exhaust to make it fit and buying parts for it . Oh I almost forgot since I didn ' t shortened the driveshaftbecause I ' m stubborn I had to drop the rear end when I changed the clutch twice because there was no slack and the driveshaft would not come out , changed the clutch once because it was 5 years old and it was starting to slip , and the second time because the throw out bearing failed after 6 months after replacing said clutch . Now that I think about it it was probably the driveshaft not having any slack that caused the TOB to fail . So glad I got rid of it .