Im going to swap the entire rear end out of my base Z. The one I purchased has a Quaife LSD in it and does not come with the side flanges. How easy is it to remove the side flanges out of my differential housing and install it in the other one? The service manual was pretty vague on this subject. From the manual's pictures, I'm assuming that they just slip in. My biggest concern is damaging the seals. Please advise.