Quick Question..
 

I have a 85 nissan 300 N/a

so far i have put the 88 nissan turbo strut,rotor, caliper, in the front.

while preping everything in the back to put the lsd, and all that other good stuff on my car.
i noticed that the emergency brake cable was cut to the rear calipers,
and i believe that the cable is the same as my 85.

my question is, how do you take it off my 85 without having to cut it and have to buy another brake cable.

Wait... So you're under the car, looking at it, and can't find the bolts to remove it? Spray some degreaser and hose it off. You should be able to find the bolts.

Well I decided I'm gonna leave the back on and just switch out the differential. And change the back to the 5 lug...
Problem is I don't know how to approach it.

I just finished my 4 to 5 lug swap. For the rear your going to have to switch the control arms. If you have your haynes manual there's a section on how to loosen up e brake cable to remove it from the caliper. I didst have to remove the e brake cable when I did my swap. Just put the caliper on the ground. Just remove the brake cable and buy some brake fluid to bleed it out later.