the brackets may help if you try to readjust,,it wont hurt to try and remove them and try something different,,I think they should be stamped for L left side an R for right side , make sure they haven't been swapped previously and make sure there not upside down as they can be installed wrong,,from the pictures it does look like it is installed right but hard to say for sure,,as far as being off a Challenger I dont think they would even mount close,, but then again I am not that positive