I'll save you time and money. Just buy the car you want.
DO NOT CONVERT CARS
First of all, the '85-86 parts are getting expensive. Number 2, save the parts for people who actually have '85-86 cars. Don't ruin an aero nose car to make it a 4 eye or vise versa.
Also, if you swap the noses, the car will never be right. Simply becuase it would cost a fortune to swap every part to make it look identical to a original 4 eye.
If you were to do the swap. You would need these parts from an '85-86 GT.
1. Front bumper cover
2. Front impact support
3. Front impact support arms
4. Fog light mounting bar
5. Fog lights
6. Fog light covers
7. Fog light wiring harness
8. Headlight panel
9. Headlights
10. Headlight wiring
11. Fenders (Lh, Rh)
-'85-89 specific
12. Fender extensions
13. Hood
14. Doors
-Dril rails are different, so are the mirrors.
15. Sail panels
16. Tail lights
17. Rear Bumper Cover
Anybody who knows 4 eyes, knows that those parts are far from being cheap. Sure you might be able to find a few aftermarket parts, but those are as good as junk. Common sense tells you that though. Just do a short price list of those parts, then factor in shipping as well. I think you'll change your idea of the swap.
Oh and thats just the exterior, don't forgot the interior. Also, take into consideration that you have to paint ALL of the parts still and have them installed. I wouldn't exactly consider that cheap. Also, you'd have to cut and splice all your exsisting headlights/blinkers wiring harnesses to work on the '86 nose. The '86 has 4 headlights and 4 side markers, and if you want to figure in the fog lights add 2 more to the total. The aero nose only has a total of 6 lights. Plus you'd have to add a switch for the fog lights to work properly.
To be honest, by the time you did the complete conversion on your '93, you'd have so much money in that car that you could have bought a stock '85-86 GT and still keep your '93 LX. Also, if you ever went to sell that car after the conversion was done. Nobody would want that car thats been all messed with, i personally wouldn't touch a car like that with a 10ft stick.
Regardless of what people think and say, these cars(talking about '85-86 and '87-93) are alot more different then you think. And don't do a half ass job either. If your gonna do it, do it right or don't it at all. But you should just not do it at all anyways.
Good luck
Edit: If your 100% set on doing the conversion, the guys over at
foureyedpride.com - Home would be glad to lend a helpful hand!