Ditto.
Test: If you can wiggle the steering wheel (with a finger) a few degrees before it "catches", especially when it is parked (steering lock off), then it is inside the rack. If the steering wheel still feels firm when you have it in park, then it's likely you've got worn bushings. Then that means looking at the rag joint, the rack bushings, the control arm bushings, etc. Given the age of the vehicle ('87) it's likely it could benefit from new bushings anyhow. You have replacement shocks/struts, so those bushings should have been replaced during installation.
PST and Energy Suspension have bushing kits.
AGR makes a nice high-performance rack.
Flaming River makes a nice steering shaft.
Or...you can simply replace with OEM parts and you can get those from most of the major autoparts stores.