I have a question. I have the same crank shown in this link:

http://oldtenspeedgallery.com/owner-.../#.UZOyubXqkZ4



This sparked my intererst "It even came with threads for a third chainring (they weren’t kidding when they marketed it as a touring bike). "

Here's mine:


Is it as easy as bolting on a chain ring with the right bcd and adjusting the friction derailleur (I'm doubting it's that easy)? Would I need to buy a longer spindle and possibly more parts?

Thanks everyone -