I'm digging into old memories here but, the thrust links and toe links can cause a 124 to wander like that (in the rear) and the upper control arms will cause a 123 to wander and feel light.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.