Did you change the differential mount too?
The subframe is suspended on the two subframe mounts and the differential mount. The only other elements in there which control rear wheel alignment are the spring tops and the control arm bushings. First be sure that your mounts are seated and that there is no damage to the control arms or the subframe.
Inspect the control arm bushings to see if they have collapsed The control arm bushing job sounds pretty tough so hopefully it is not that.
It is also possible that you have spring problems but as I said, as the wheel goes up the toe goes out.

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Tom Hughes
St. Louis
84 300SD
92 300D
86 300SDL