Eaton Detroit Spring gets my 5 star rating for customer service. I ordered a set of rear coils for my '66 Le Mans, and there was a few days' delay while they manufactured them for me from the pattern. When they came in, the bottom coil was a bit too tightly coiled for the spring clamp, so I took them down to their shop for adjustment. They not only remade them while I waited, but made a copy of the clamp so that future production of this part will be perfect.

Kudos to Mike and Mickey at Eaton Detroit Spring!