[JLMounce]

It could still be alignment related. In a linkage system like that in a first gen, there's some variables at play that your basic alignment tech might not think to check which can cause one side to have more steer than the other.

The pitman arm can only be attached in 90 degree increments, so it's hard to mess up there, but take this scenario into account.

1. The steering box has aged and has some tolerance stack in it.
2. The steering linkage has aged and has some tolerance stack in it.

Think about what happens when you "center" the steering wheel to start the alignment. Many times this is either done with the car stationary, or at best over just a modest run up the alignment rack's runways. You can stack a lot of tolerance there and the wheel may appear to be on center. The alignment is performed and the toe is set at the tie rod sleeves. This car because of tolerance stack in one direction will likely drive straight, but may exhibit more turn to one side than the other because the system wasn't truly at zero.

Add in a worn out rag joint or an aftermarket steering wheel that is maybe a single spline off from center... I think you see where I'm going with this. Your basic alignment service tech at PepBoys isn't going to bother checking any of this. His job is to simply get the wheels in spec as the car sits on the rack.

This is now unrelated to the OP's original question, but it points to why keeping the steering system is good condition is so crucial to how these cars drive. It may speak to why there's a desire to move to a rack and pinion when data proves over and over that doing so in a stock sub-frame first gen actually makes handling worse.

What does happen though is steering gets a lot better. Not necessarily because rack and pinion is better, but because replacing what you had with a new rack, fixed all the old and worn out in the original system.