Rear: drum to disc conversion

[damith]

I'm changing my rear drum brake setup to disc. So far I have the follwoing.

Discs, calipers, arms.
Am I missing anything? guy wants to sell me the drive shaft which comes with the rest of the items. Do I need that or I can use the existing one on my e30?

my car is 1987 320i

[Jean]

You need complete trailing arms with all the things on them, including e-brake cables. You don't need the driveshaft.

[damith]

You need complete trailing arms with all the things on them, including e-brake cables. You don't need the driveshaft.

Gracias