Post suspension alignment question
 

I just replaced all the suspension components in my 98 base with the exception of the front track arms. (I just forgot to order them). The car feels sooo much better (103k miles) -much more stable and smooth. I took it straight to the local shop for alignment- a tire shop, nothing special. So two things. They were able to get the front alignment dialed in perfectly, but could not quite get the back. Toe on one side os 0.006 but the other side is 0.068. He told me there might be some frame damage preventing him from getting it perfect. There is some unknown history on the car even though the title is clean. He suggested an adjustable rear track arm to solve the problem. So the question is if there is damage should I pursue fixing it, or should I try his adjustable arm suggestion?

What is the camber on the 2 rear wheels? Excessive camber will restrict toe adjustment.

As the springs age they compress. This adds camber and at some point there will be so much camber that you can't get enough toe-in with the standard components. AT that point you either replace the springs or add non-standard components that give you more lee-way.

OK so left rear camber is -1.1 and right rear is -1.2. They looked to be right in spec.

So you should be OK for now.

Can you get spring spacers to adjust the ride height on a 986??

Is there any other reason you can think of that the tech could not adjust toe-in?

If your car's camber is -1.1/-1.2 as stated then that is easily in range of the stock components to adjust toe. You should be able to go out to around -1.8 or so before running into issues. At this point I'd suggest having someone who knows these cars have a look. Especially after reading your other post.