Hey, I recently bought a diff from a 82 turbo zx to replace my 83 n/a zx diff. Am I going to need other parts? I looked through dozens of pages on here and companion flanges seem to be ther only potential problem I'm going to run into wit this install. I would really appreciate if someone could please clarify this. I was hoping it would just be a simple install (drop old diff, put up new diff, done) but after reading up I'm second guessing everything.