Dropmember on a Dually. Steering?

[D.FENS]

Considering a Porterbuilt Dropmember and control arms on my C30 CCD.

The regular C10 dropmember kit is set up for a Unisteer or similar MII rack and pinion, and I would assume the C30 kit would be the same.

Anybody have any inside info on how the MII rack works on really heavy vehicles, like a crewcab or a Sub? I called Unisteer this morning and their guy said they haven't actually done one themselves but wouldn't recommend it.