If you do use a spring compressor on the front, be sure you get a good one. In fact, Jim has a homemade one that is better than them all. contact him. Cheap compressors have a tendency to slip and the spring explodes in your hands. But, as Jim said, unless you want to lower the front about an inch, you really don't have to replace the front coils. If you do want to lower the front a tad, then get the 625 springs, and do the Shelby drop. All of that information is available to you in the Classic section at the top called the FAQ.