I just did a set of BBK shorties. The directions provided by BBK are pretty spot on... However, I did look at the write up done here :
http://www.mustangmonthly.com/techar...ers/index.html
It was pretty helpful and gave a couple of tips to help me out. OVerall tho, I followed the directions from the BBK headers.. Here's a couple pieces of advice I will add:
1. The following tools are all but manditory IMO:
5, 8, 10, 13, 15 mm sockets, both normal and deep as well as extentions (enough to reach maybe 9" or so), as well as a 3/8" normal socket (the Header bolts BBK gives are this size, not metric.)
the same sizes in wrenches, preferably the type that the box end ratchets
One of those universal joint type bends for a ratchet, two if you have them
jack stands
Floor Jack
2. You will be removing the steering arm, both motor mounts, and the starter. The starter is 3 bolts and there was no need for me to disconnect the wiring. It was far enough out of the way just unbolted. The steering arm is two bolts, one at the top and one at the bottom. When you remove the steering arm, make sure you do not move the steering wheel.
3. The motor mounts are nothing to remove.. one nut from the chasis, and 4 bolts from the block. Don't let the idea od removing them intimidate ya. Just do them one side at a time.
4. Take your time... It's not a hard job, but it is involved and time consuming. Make sure that you have some help doing this. 2 people is ideal, even if one of them is nothing more than a "go-fer" or to hold a part in place while you start a nut.
5. Expect to spend all day on the project. Like I said, its not a hard job, but it does take some time.
6. The studs for where the collectors bolt to the mid pipe.. screw them all the way in before trying to tighten any nuts onto them. The drives side you can do before you put it on the car, but the passenger side I could not make fit with them on, and had to put them on once they were on the car.
7. Take a minute and look at the headers befoer you begin bolting them on. In some cases, you will have ALOT easier time using the stock studs instead of the header bolts supplied with the kit. Other times, it's much simpler to use the bolts. Take a minute and look at the headers and you'll easily see what I mean. The stock studs are re-useable, and so are the nuts.. I checked with Ford.
If you have any specific questions, fire away. I'll answer what I can.