Had to buy a donor car for my 77 SE. It came with the WS6 with 4 wheel disk brakes. I am going to use the rear differential on the 1977. I have purchased a new master cylinder and booster, proportion valve and new brake lines. I am having the gears replaced with 3:23's and of coarse, new rotors, calipers and pads else for it. Question, Any thing else I need to worry about or change out while its going in and the car is getting put back together?