The ONLY place to go for correct springs is Eaton Detroit Spring. http://www.eatonsprings.com/ I've replaced springs on several Mustangs over the years, and recently installed a set from Eaton. They had the correct round leaf ends and clamps. The only criticism I have is that they came dipped in a very heavy black paint. Rear springs were unpainted from the factory and plated with zinc phosphate/oil, but apparently Ford replacements were dipped in black paint. (If others here know differently, please chime in). It took me hours to strip all that paint off. Under the paint was indeed zinc phosphate plating though. I'd suggest asking Eaton when you place your order if there's any way you can get them unpainted.