Kind of slapped together
Join Date: Jan 2010
Location: Bossier City, LA
Define "complete rear end". Because, a complete rear end should be subframe and all - and if so, you wouldn't be asking about "plus the upper and lower arms".
The diff swaps right across, but do match the VSS gear (BIG hint: If you're getting out of a yard, and the tranny is still in the car, grab the VSS out of the tranny also. That way you have the right gear to hand).
The LSCs have a 3.27 gear, the non-LSCs a 3.08.
NO Mark VIII has a tracloc from the factory.
The upper arms are identical, no need to grab them unless you just want to. Not a bad idea, you can swap the inner bushing while still driving the TBird, and that includes pressing the old one out, getting the arms powder coated or painted, and then pressing a new one in!
While swapping, go ahead and replace the spindle bearings.
Also, all bushings that you can get. Due to availability, that pretty much means Energy Suspension poly bushings for the spindle and LCA, factory style UCA/frame bushing.
Also grab new diff/chassis bushings - again, Energy Suspension has those.
Keep the parking brake cables, unless you're already disc in the back.