Mike,
I have never done one these. I am in the process of having a Fox pin gun restored. No stock, no trigger guard, safety is missing, the 32" dented barrels had been painted black, the list goes on.
With the cut barrels, yours will never command top dollar, but you knew that. Still 27" is a reasonable length. I would start with the straight mechanics. Get the action working 1st. The tang sounds like it could be repaired. I know of a couple gunsmiths who I could recommend for that work, Bill Schwarz in GA and Dave Norin in IL.
After that you can decide about the stock and metal refinishing...
Loving Doubles has a buttstock for sale:
http://www.doublegun.com/lovingmore.htmlPete