Coming along nicely. I have to admit when I first opened the thread and saw that terrible low res model in the first post I didn't have high hopes, but you've proven to be pretty capable at modeling. The only issues I see are more surface related and probably make no difference to your project, so I understand. I pulled your model into keyshot and rendered out an image.
On the topic of those blueprints, from what I've seen there are good ones of the short wheelbase early 911 but I can't find anything for the long wheelbase.