im new to third gens.. ill be honest.. dunno even where to look, but based on everything else, im betting this things is 100 percent all originalMight want to consider replacing the steering Rag joint while you are at it. It'll clean up any slop that exists between the steering wheel and input shaft on the steering gear. They get old/weak and flex a ton causing quite a bit of transition slop. Contributes the stereotype that they wander all over the road.
If the rag joint already has bolts/nuts its been replaced. if its got rivets then its original.