KNOW WHAT YOU'RE DOING. It took us about 12 hours in a garage with normal hand tools, but we were installing the throttle body and fitting a Pro-M to my Volant, which took some time in it's own right. My only previous experience was with my exhuast/intake and headers install, but my Uncle is an experienced mechanic and was quite helpful. Now that I know what I'm doing, would maybe take four or five hours at an easy pace.
We had some trouble with the following:
1. The fuel rail has a few bolts, then you just pop the injectors out. We were hesitant, but with a little tug, they'll come.
2. One of the vaccuum line holes on the back of the 2000 intake needs to be plugged for install on (at least 2002) Foci.
3. On the bottom of the old intake, drivers side, there's a plastic tube that just pulls out and pushes back in the new one. It took us awhile of playing with the connection to realize there was no screwing involved.
Other than that -- was pretty straightforward. Nice gains
You also might wanna look into the new Ford Racing intake CTZX3 has modified for our enginges....looks pretty nice