I've always been a Centerforce fan but everyone in the mustang world seems to be crazy about SPEC clutches. Is there really a diff? Also anyone know about what it costs to have one installed? I dont have any place to work on my car to do it myself and I'm going to be taking a large road trip im just over a month. Currently the clutch seems to grab ok, but it seems like if I dont MASH the clutch to the floor it grinds a little when shifting up or down.