[huntsman]

While my knowlege in Parkers is slim to none, I thought I'd chime in.
This sounds like a really cool gun combo , I think well worth checking out. There are a couple of real good reference books out there on just Parkers and maybe someone over at gunshop.com could help, I think they still have some serial # reference tables posted there.
The only thing I'd really worry about is who made the rifle barrels, If they turn out to be factory, then no sweat but if they're custom made then I'd check into fit and if possible shoot them to make shure the barrels are regulated and have the correct POI.