Originally Posted by
keegreil
Thanks for the help! That's about what I was guessing. I think the best option is to do whatever I want to it to make it a bike I enjoy riding. And then ride the heck out of it. Right now it is my daily commuter to work. I suppose I just wanted to make sure I wouldn't be breaking anyone's heart by modifying a "rare vintage piece of history" with a few modern components, and foregoing a proper restoration.
Had trouble with pictures before, trying a different computer this time. Oh and I realized I mis-represented the speeds earlier out of ignorance. It is a 6-speed bike, or 6x2. 6 cogs, and 2 chainrings. You get the idea

...I got to your photos using the link you posted. Relax, it's not some great piece of cycling history. Just do what you want to make it pleasing to ride.