Adjustable suspension has been a no for at least 3 years, when I first went to have my car engineered. One of the first questions I was asked was "Do you have coilovers or any adjustable suspension?"
As soon as I said "yes but no" (My rear Bilsteins have a height adjustment, but were fitted to the R31 Silhouette GTS from factory), everything was alright.
I think the issue that will get you really stuck is if (really big if) the suspension can be adjusted below the minimum legal ride height.
Sometimes you'll get an inspector that will just give you a flat out no, one or two will actually be willing to let you explain what the go is first, then probably tell you no