They collapse with use, and fortunately, they are cheap to buy. If I remember around 8-10 bone's apiece, pick up 2 of em, and you won't have wonder about em for alot of mile's. /forums/images/graemlins/grin.gif Also get new nylon bushing's that the spring's push down on. /forums/images/graemlins/grin.gif
You have one that needs replacing. When I rebuilt my 60 both springs wre about 1/4 inch shorter than a new spring. Ive always gone to Bayshore truck here in Fresno for my 60 parts, Great prices and the guys know their stuff.
ORD has a replacement kit for both sides. Mine was $25 shipped and came with new springs, nes washers, & new bushing. You can then use you old washer on top and it has a small amount of preload then.