First, let me say that i think you're wasting your time and money. It will cost about the same as a b16 swap to put itb;s on your d-series, and the stock b16 wil still smoke your itb'd z6
that said,
CBR 929 ITB's are a STUPID close match. 2 and 3 are just slightly off. you can get a set of those for about 500-1000 on ebay.
next, you need a stand alone
next, you need to figure out how to idel your car
next you need to figure out how to hook up everything that runs off vacuum- aka 90% of your cars accesories, fuel, and emissions stuff
now, you build a D-series head that can actually USE Itb's- hold revs to 12k... aka- never going to happen in a d-series. 9 is pushing it. cam overlaps are just too restrained on the single cam...
itbs will start being being effective around 5k, and won't make any real power gain until 7k
so, now, do you still want to do this?