Check the front sway bar links and make sure they're in place and in good condition. Also the front jounce stops need to be contacting the lower control arms.
Lots of people make the mistake of changing the ZW7 suspension by replacing the Nivomat shocks (the G65 RPO code) with standard shocks, and without going to a firmer spring. Makes things really squirrely.
@Tonyrodz that driver's side parking brake cable should be under the sway bar (same as the passenger cable there). Like this:
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