The Ghia should already have them.
Come to think of it the only mod I recall ever having to do was to fit an extra wire for the oil pressure gauge, as the Corsair lacked this and (for some stupid reason) the Ghia loom was identical to the Ti loom except for this wire (well that, and the 'better' climate control parts). The T lacks this gauge I think so maybe no big deal but just incase you did want to install that dash component (again, do-able).
I also got another passenger front door lock actuator and modified this (basically flipped its gears around) so that it worked on the drivers door. This meant that locking / unlocking the drivers door with the key or by pushing on the knoby thing would -not- lock the other doors automatically, but it DID mean that pressing the button (where the window switches are) would lock all 4 doors and not just the passenger doors. That button is essentailly what you tap into when installing remote central locking / an alarm so it instantly becomes a worthy mod. Again, that just requires a little modification to the loom in the drivers door.
I did all of this 5 years ago now so I can't remember specifics but if you're handy with a multimeter, a wiring diagram and a soldering iron it's pretty easy to figure everything out.
Oh, this mod also gets you the red lights that go on the actual doors as well. So I think it's well worth the effort versus an aftermarket kit. Only problem is the actual window regulators / motors from a now 20-something year old car will probably be a bit flogged out compared to a new part. But I imagine they all work the same, so if I had my way I'd still make use of all the stock electrics, switches, wiring, etc.
The hardest part of the install is removing the dash enough to expose the wiring loom so you can pull it out, also, part of the main interior loom goes back through the firewall on the passenger side for the left hand indicator, removing and installing that was probably the trickiest part of installing the loom itself.
Edit: Take a look at my thread here: Has pictures!
http://www.antrx.com/smf/index.php/topic,8415.msg255833.html#msg255833Link is direct post to where I started doing the conversion, it spans a few pages from there so have a skim through if there's anything useful. But again I no longer have the car (still miss it a bit) and it's been some years now so everything I've written here is probably as much as I can advise - but if you do have any Q's I'll keep my eye on this thread for a little while. The Foglights required some extra wires be added as well.
You can use your original loom for wires and plugs so it's hardly a big deal. Also, hang onto your original wiring loom -- it's fantastic to be able to take long wires from for any car project. Lots of colours etc to pick from. I still have my TRX loom in a milk crate and even now doing things in my Skyline, I'll just take whatever wire I need from that! Costs nothing!
Edit2: Guide to modding the door lock actuator was on the Wiki which is broken, but a brief mention and some photos of it are here, my thread page 22. Again, with any ingenuity, it's pretty easy. >>
http://www.antrx.com/smf/index.php/topic,8415.msg258176.html#msg258176