6.7 is first because those are the boards he first was working on and those have different pin out and plugs so once those are done he will start on the 5.9's and get those done. Just the way it worked out.
3800.00 for the ecm. The ecm will do most data logging you will need, it will not directly do egts but with an external egt box it will then log as many probes as the box will handle.
It will not have trans control when it comes out and may not for a very long time. If you have an auto and want to use it you will need a full manual vb or go to a PCS stand along trans controller wich for competition purpose may be that better route anyway.
The ecm will come with a standard tune and tuning will be up to the end user.