Hi there:     
     
Mikey and gunnut69, thanks for the tips.  I spoke with my 16 year old today and this will likely be a project for the both of us, so anything we can do ourselves is a plus.  I do reload, so ammo is not such a big issue and the ability to use pistol bullets for a knock-around load is a plus. 
I don't think I will go for an' improved' configuration, just to keep things simple.     
     
We have talked about black bear hunting so the caliber is also right.     
     
By chance, my first C&R FFL arrived yesterday, so I will be able to buy 7mm and 8mm mausers complete latter on, though a couple of Russian rifles and  Swiss k31s are the first order of business on that front. 
Have you any tips on sellers you'd like to pass on?
    
Midway has a Adams & Bennet Mauser 98 barrel/syn stock combo ,in 35 Whelen, for $150.  I think that will be a good starting point for this project.    
    
Is it possible for an amateur to finish reaming and mounti a barrel using a set of go/no go gages, reamer, receiver tap (to (re)chase the threads to specs, and a vice, barrel wrench?  
  
By the way, I do have a small oxygen/acetylene torch set ( I am an artist and am trained in the basic skill set.) :-)  
 
Cheers, 
Eli