Sorry for intruding, but the cars that use these transmissions (350-370 and their infiniti counterparts) use the wheel speed sensor for speed readings. So unfortunately you won't be able to, you'll can use a driveshaft pick up unit (mount a magnet on the driveshaft, and a sensor picks up the reading, but has to be programmed), or you can use a GPS speedo, or a GPS unit to speedo. Autometer makes the GPS unit to speedo, but only works on electronic units (so cable driven doesn't apply).
Also, be careful, the CD003 (early units) have issues with synchros (but are known for holding good power) and generally go for about 300-500. The CD0009 (the good one) cones in two different flavors. 1) for 05-06 350z/G35, and 2)Late 350z (07-08), 370z, and G37.
The main difference between the two is the early and late CD0009 is mainly the the external slave and internal slave. There are also a few minute differences (the input shaft is 10mm SMALLER on late units). Ideally you want the external slave version, if you use the internal slave portion, you'll have to come up a few things to make it work (Colin's adapter already makes a kit for this though, but you'll have to shell out an additional 400 bucks).
However, you can purchase a CD0003, and upgrade to an early CD0009, you will need a few things from the them though; Clutch forks, pilot bearing, shifter, shifter tripod linkage thing are all different. Slave cylinder, and driveshaft are the same though.
Same deal with the late/early CD0009, the driveshaft is the same, and the shifter SHOULD be the same, but I'm not sure, as most do not OPT to go this route, but Nissan did fix the issues with between the early and late CD0009's too. Early CD0009's have an issue with 5 and 6 gear grind, and they fixed it on the late CD0009's.
As a shameless plug for my information I do have a CD-series transmissions for sale. I have a late CD0009 and a CD0003 for anyone who wants to purchase them. I do get these transmissions pretty often though as they are a good option for 2jz fellas since you can do the entire swap for the cost of just the Gertrag trans
Also, the main reason to use any of these transmission is: 1) gearing is amazing, 2) are readily available, 3) have been known to hold about 1000 HP