I had a Z6 in my 4dr EF, and kept power steering on it. I used either a B2 or A6 PS bracket and pump. If I remember correctly, you have to drill the hole on the PS bracket that connects to the side mount larger so the bolt can be angled correctly. And place a washer in between the PS bracket and mount bracket. But, I ended up taking it off because I couldn't find a VSS with the PS ports on it at the time, so it felt extremely loose at higher speeds. But you can disconnect it and run it without the pump without any problems to the rack.