Brake Booster and Fan Question

[Z2TT]

Hello.

I'm wondering for people who have done this swap, is there a brake booster that can be used that will still have good assist (Heard E21's have less assist) and one that doesn't require the inlet manifold to be hacked up.

For fitting an Electric fan, which one will fit? I want to use a puller fan so between radiator and engine. I will be using E28 mounts.

Is there a radiator that is thinner to allow for more space? Perhaps E28 Rad?

Thanks.