steering and handeling help, 73 duster

Check the toe.

Totally agree on this, and just because it has been aligned does not mean it's right.
Do you know how to give it a quick check with a tape measure?
I have poly LCA and strut rod bushings so I run about 1/8 in toe in.

Also I didn't see any mention of of strut rod bushings in your post.
Those are pretty important for the problem you are having.

Might try swapping the tires from side to side to see how much it affects it. (see if the problem changes sides)