If you have the 8.8 in your car already, just use the axles, calipers, backing plates and e-brake cable ends and put them in your existing rear end. You will also need the flexable brake line that connects from the hard line to the caliper. This will make your rear track about .75" wider on each side (same as the rear end in the Lincoln). If the front rotors and calipers are there and your car is a 87 - 93 you can use them on your existing spindles. How ever because of the depth of the front hub your wheel choices are a bit limited as many of the newer wheels have shallow centers and you can not use the center caps factory 94 - 95 SN95 wheels will fit fine. Currently I am using 17" GT wheels that where first used in 1996 on my car with modifications to the center caps, with 245/45-17 tires no issues at all in the rear but there is some rubbing on the inner front at full lock turns, I took care of that with 5/16" wheel spacers stopped the rubbing and also gave the wheels a more even looking track front to rear. Most write ups will tell you you have to change the master cylinder and proportioning valve. I used the factory pieces with my 87 and have had no problems though I have been told that I can get even better rear brake response with an adjustable proportioning valve.
there is a good write up here on this board
and I know Adder has a link to SN95 brakes that has a very good write up also.