I\´ve known more about this,
Ref Monroe: Front: R2053 Rear R1101 (both in gas),
Kadett B Front: same, Rear: different ref.
Kayaba (USA) Front KG4613 Rear: KG5552 (Gas-A-just), in its web site tells that the rear units are used in other models...Toyota, Isuzu, Volvo, but Monroe or Bilstein, or Lip don\´t works in the same way ¿?.
Kayaba Europe`s catalague have the Kadett B references.
KONI (Classics models standar, non external adjustable) 80/1520? and 80/1997,
Lip doesn\´t have any reference for GT.
Thanks