Quick Question

Well anything... like window louvers, and whats this thing about a ranger manifold? and could a put a 87 rear bumper onto my 86? Does anyone know where I could find a book or something with that kind of thing in it
 
Hmmm, I don't beleive anyone has ever made a book or reference source such as that. However, almost all the information like this can be found by seaching stangnet or turboford.

The ranger header can be swapped, but your EGR tube won't fit and you may need to extend the wires on the 02 sensor.

I beleive the 79-93 rear bumpers are all the same, but of course the GT bumper is different.

Rear window louvers are an aftermarket option and fitment information can be found with them, but I'm pretty sure all 79-93 louvers would be the same.
 
Funny thing is, your guess of 1 million is probably about the number of 87-93 mustangs produced in that time span. LOL.

Ugh, don't do that. There's already enough people turning the "four eye" cars into "aero" stangs. Leave the poor thing alone, don't you want something a little different from the million other '87-93 Mustangs on the road?