so i picked up the rear disc off the 92 ls today came home started to put them on my eg everything measured out the same e brake cable is longer but do i need to change anything else like the booster or the por valve

 

they will fit flawlessly. use the intergra brake cables, and just swap out the trailing arms with the intergra's. Just don't use the integra lower control arm, or toe in tow out bar that's on the end of the trailing arms.