Jay,
If you've visited the thread I've been working on you probably realize a few things by now:
1. There's no way of telling what the ROT is. Even if we new what it was for the serial numbers before and after yours, the cars were often not built sequentially.
2. The I. B. Color code can be determined by inspecting your interior and comparing it to my table. Be careful to make sure your interior hasn't been repainted a non-original color.
3. The DEV in Trim stands for "Deviation" in pattern.
4. There''s no way to be sure what order type you had, unless you have some of the original paperwork.
5. In this case the Region/District is the DSO of your door tag
6. DSO here means any special order instructions
As Tom said, you can get a better idea about some of the other details by visiting the thread.
If I can help with any specific questions after you've read some of that info, just let me know.
BTW, Some of the reproduction build sheets being sold as '66 are not the same as the original samples I have on file. The printing stamp in the bottom left-hand corner should have a July date on them.