In spring 2012 I embarked on an effort to do 3 things. The differential would be replaced with an R200 Nissan Diff, the front suspension would be stripped off, refurbished and replaced with new bushings and the rear suspension would also be completely rebuilt. A stainless steel exhaust would also be fitted to the car as removing the old exhaust in order to install the Nissan diff would destroy the old exhaust. Below are links that describe each of the efforts.
The patient
Denny (AKA Stockybod) strips off the suspension
Bob and Jim (AKA jhuss) work on the diff
I tighten up some bolts on the drivetrain