We all know how to spin wrenches, and most of us are convinced we know how to take apart and reassemble our cars blindfolded, but do you really know everything you should? Unless a factory assembly manual was used to glean techniques, procedures, and specifications, you probably don't. For example, the subframe on an early Camaro is pretty easy to bolt up, but did you know there are alignment holes in the floorpan to help square it up? Misaligned subframes, either from improper installation or worn-out bushings, are the source of much body-panel-gap frustration. Most factory manuals are reprinted, so see what the guys who built your car the first time had to say about it.