I replaced the following on my 85 Carrera with OEM components at around 90K miles:
- Front A-arm bushings (using Elephant Racing bushing tools)
- Front sway bar bushings
- Turbo tie rods (you probably have these already)
- Rear sway bar bushings
- Rear drop links
- Engine mounts
- Transmission mounts
Also replaced the factory Boge strut inserts/shocks with Koni yellow adjustables.
Made it drive like new.
The main improvements came from the front sway bar bushings and engine/trans mounts.
--Dave