Bill -
Do you already know which is driver and passenger side, and front and rear? How assembled is the car you're installing them on, and does it have original or repro front inner fenders?
They are not real hard to install. The front pair have one leg longer than the other, and have the two brackets coming out perpendicular to the can. The longer leg bolts out to one of the lower fender extension bolts, and the other leg is behind the can, so if you don't know which is driver and which is passenger, that's the way to orient them (usually the passenger side is easy to tell; it's the one with the legs half eaten by battery acid). If you have repro/new inner fenders, you'll have to drill the hole for the back leg. They also have a big washer on the underside of that back leg (can't find a pic, but I can take one if you need one).
Rears are even easier than the fronts.