I'm trying to get four 6"x8" speakers to replace the crappy factory 6"x8" speakers in my girlfriend's 1999 Ford Contour. According to the crutchfield website and one of their guys that i talked to, only a 6"x8"C (as opposed to a 6"x8") would fit in the stock locations. This came as a surprise to me since i thought a normal 6"x8" or even a 5"x7" speaker would work. Is crutchfield full of it? I don't want to get a 6"x8"C because my choices become severely limited (basically only a Kenwood excelon speaker would work). Does anyone know if normal 5"x7" or 6"x8" speakers would work without major modifications, especially since i am going to get them professionally installed?