you may or may not need to enlarge the hole in the driver side shock tower to fit the connections/wires through and possibly extend some of the wiring on the driver side. Def the wires off the brake switch, the coil, I did so it routed better and was not stressing out the wires. It's a tight fit but you will need to feed the connectors in one at a time through the holes. it also makes it much easier to take the wiring out of the factory look and tape it up using quality 3M tape. Make sure the wiring is up and out of the way from the tires and
suspension. I used a waterproof junction block on the upper frame rail to connect all the positive and all the negative wires together. I then took one 4 gauge wire from each block to ground to the frame and the positive to the starter solenoid.
Forgot which years but the front headlight harness that wraps around the front is one piece and you either need to cut and re route and rewire that... for the passenger side. that is pretty easy and just plug and play. I didn't hide the starter solenoid but may relocate it inside the fender well as well. I also hid the MSD box inside the driver side fenderwell.
You can also tuck the harness and brake lines below the pinch well on the cowl panel, as well as tuck or relocate the vacuum tree and MAP sensor out of sight to clean up the cowl.
Foxcast Media, House of Dula,, NeoMustangs all have videos on how to do it . Take pictures, video, etc and label the wires if you need to. Take your time as it will take a few hours.