I have ordered a spax -60mm kit and to go with this I am going to purchase new top mounts and a full front and rear powerflex kit - problem is, there are different bushes! So which bush do I go for?

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The car is a 1982 type 81 Audi 80 CL - the differences are...
Front arm, is it alloy? or steel?
And are the anti-roll bar bushes 24 or 25mm?
As it is not a sport model and has the 1.6 carb engine, I would guess that the roll bar is narrower (so 24mm) and the front arm is steel?
Does anyone know this? Or know where I could find out?
Cheers
Jon