If the steering feels too light or overboosted, you cn try tightening the steering. On top of the steering box (as viewed from leaning into the engine compartment) there is a large screw surrounded by a lock nut. Mark the position of the screwdriver slot in the nut relative to the steering box and then with screwdriver in the slot, loosen the nut (13 MM I believe) and then tighten the screw about 1/8 of a turn and then retighten the nut. After this go out and drive her, be careful as you don't wish to tightn the steering to where the steering wheel will not come back to center after the turn.
http;//shrubbery.student.utwente.nl/ is the source for this adjustent and the site (Johan and Sean) is madatory viewing for all E32 owners.
I did this adjustent on my son's 1988 735i (1/8 of a turn) and he said it really helped the steering feel.