Its been a while since I have done a spring replacement job. I don't recall wherer or not you have to remove the front leaf spring perch to remove and later install the leaf spring? In other words, can I remove the leaf spring from the car by unbolting the leaf spring at the perch, leaving the pearch in the car. Remember something about the perch being held to the car with captive nuts and were very easy to break off. Thanks in advance!