Ok i dont really know much about SFAs except that they are just that, sfa and that they use leaf springs. Ive noticed ford has them, not sure if dodge has them...but why doesnt chevy (or dodge if they have IFS) have SFA? are there more disadvantages to having a SFA then there are advantages? is it easier and cheaper to GM to make IFS? is it just a smoother ride type of deal or what? why no sfa?