Assuming it didn't wander before, and everything else are the same parts (steering gear/coupler, etc.) then I agree that alignment is likely the issue. I had this same problem on my '80 Aspen. A second trip to alignment shop helped, but I am looking for another shop that has someone who knows how to align an old Mopar.

Bad or loose wheel bearings can cause wander too. Maybe check the nut to confirm proper tightening. Easy and free.