Very nice find Richard! You can still find plain ordinary 20 3/8 tires new. If you want the correct tires your best bet is to look on Ebay. Be forewarned these tires can be expensive, over $100 each for a NOS slick. Try to avoid used ones unless you can see them in person. Most used tires of this age are dry rotted beyond any real usefulness. 66 was the only year that had that front sprocket and 66 & 67 had the smooth shifter arm. Looks like all you need to find is the correct sissy bar. The Fastbacks are one of my favorite bikes Schwinn ever made, I had one as a kid and still have a few now. Again thats a very nice find let us see more after you clean it up!
