I just had my 82 242 aligned, and it shows the rear right toe at -.13, which seems a little much. It shows a total thrust angle at .10. Is there any way to adjust the rear toe, or is this anything to concern myself with?

I agree with JetDriver, particularly the big rear trailing arm bushings. I had a full INCH of sag in the back of my 87 before I replaced them. Obviously the axle could move fore and aft some too, and soemtimes you'll get a symptom like this: on the gas, car tracks left- off the gas, car tracks right. This would indicate one being much more worn than the other. The axle is located in two dimensions by these two bushings. I'd count on them being shot.
Try raising the rear of the car by lifting under the frame or jack mounts (not the axle or trailing arm for this test) and try to lift the axle at the big bushing inside the trailing arm. IF it is able to move much, then they're shot and you need new ones. Cheap part/bunch of labor to install.
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Rob Bareiss, New London CT ::: '86 244DL- 215K, 87 244DL- 230K, 88 744GLE- 198K, 91 244 180K

I don't know if you should be concerned about the specs but the only thing you could do is replace all the rear bushings which could be worn out depending on mileage. Someone will probably chime in and say if it is out of spec. If it is out of spec and causing problems then replace bushings and recheck. If still out then a fram alignment shop would have to straighten if it had been wrecked.
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92 244 lowered, Bilsteins, IPD sways, Unitek cam/header, TSW Revo 18x8's - 94 965 Niiice MONEY PIT! - 76 Datsun 280Z lowered, modified head, cam, headers, intake