More specifically, for the 1977 model. I know of a few differences between the 75-76 models and also the '78 model. Take a look in the download section...
The 'blurry' print is just a product of AutoCad printing to Adobe. When printed on paper, the true font and line weight come out as intended. To print, use the 'print current view' option in adobe and 'pan' across until you print the whole thing. I wouldn't suggest trying to scale down too much, but will tell you it looks beautifu