Well depending on when you bought your kit, the early installs left a lot to be desired, the driveline angle was horrible, linkage alignment wasn't any better,.......but the last few years, the "crew" at Keisler's engineering has grown, better designs/ products have been developed to "correct" the past "errors" or "development issuses",....esp in machining more excess off the case, better shifter locations, and shifters, as well as complete tranny crossmember mounts, to address the anglement issuses,......back in the day, you had to cobble your exsisting tranny crossmember until nothing was left to it.....the last few B/E installs were trully "bolt-in", the only correction was a driveline phasing, acomplished with rear axle perch shims from about 1-3 degress increase, available from Mopar Performance, just like you'd use if running SS springs, and needed to dial in the 3rd member