Originally Posted by
big chainring
The LeTour in question is made in Japan, right. Are Japanese bikes and components allowed?
Yes, they are. As long as your bike fits the 'spirit of the event', which is vintage bike racing, you're good.
With a few changes that Schwinn would fit those requirements easily.
Get rid of the rack, the reflectors, the dork disk and pants guard, and you're pretty much there. No money needed, just a little work.