If the action is flat on the back where the rear base is then its an older stagger feed model. Savage switched to Center feed to accept box mags.

Honestly I would sell that one and find a nice center feed SS action to do your build. You already have other calibers in mind as well as a different stock. CDI makes bottom metal for the savage action to accept AI box mags like stock you have pictured above.

I believe you can modify a staggered feed and convert to center feed box mag but I'm not sure. If you want to explore that option start a new thread asked if it can be converted.

Im guessing your talking the super sniper scopes. Dont know much about the.
swfa makes a great scope as does vortex and luepold. I highly recommend the vortex HS-T scopes from midway or a nice PST.