87-93 brake upgrade

Hello, I was wondering if anyone could help me with a brake upgrade for my 88 lx to make it stop better. I already did a five lug conversion with mark 7 rotors and motorsport axles and drums. Does anyone know of a somewhat cheap disc brake conversion for the rear, and anyway to make the front stop better while still using 15" wheels. I heard I could use front calipers off an svo that are bigger, but will they fit my spindles and clear my wheels. Any help anyone could give me would be great. Its hard to get my car to stop at the end of the quarter at 114mph :)
 
See http://www.svo73mm.cjb.net/ for all you need to know.

Use 91 Lincoln MK VII calipers up front, 87-88 T-bird Turbo Coupe rear axle (comes with disk brakes and 3.55 or 3.73 gears) & 94-95 Mustang GT master cylinder, stock power brake booster & Wildwood proportioning valve. That's what I have and the brakes are great! :D . I got all the info on the how to do it from the website I listed.
 
I think the 73mm front calipers are a good idea.. you can get them off of a crown vic and some other cars, it's all in the site listed above. I believe they use the same master cylinder/booster so you don't have to change anything.

For rear discs im sure you will have to get a new master cylinder.