the perch should always be in contact and the rubber stop should under normal driving never be hit. If you have a bad perch it will affect the ride height of the side in question and if you have a bad bump stop you may never even know it. The perch is held by the 2 front bolts to the sub frame and the bump stops are bolted to the A arm. Kevin I do remember showing you a perch but not a bump stop. HTH