Bilsteins for a 123 are a bargain as compared to same for a 124 car.

The bottom bolts on the front are no problem with a good 12 point box end. Turn the steering wheel to each limit to reach front and then back bolt.

A standard Craftsman box end wrench may be a problem because they are big and bulky. This is a tight spot. If you insist on buying Craftsman tools, get the polished version combination. It is thinner on both ends and should fit like a Snap On.

Good luck,