OK, I just picked-up a set of oem Mazda springs that are nicely sagged to put on my AGX's, but the guy shipped them w/o labeling F+R. One pair is about an inch longer than the other. I really can't tell which should be on the F or R, as my current springs do not match these. Also, they have two white paint marks on them closer to one end than the other (factory marks); anyone know if that is top or bottom? Thanks.