Yes, that is a very buildable rifle. You can get replacment barrels (and install them yourself), triggers, stocks, and so on. The parts are interchangable with the non-accutrigger Savage rifles. The Stevens may shoot well enough for longrange right out of the box. It really depends on how accurate you expect it to be. The only way to know for sure is to try it out. If you're willing to spend a little time and money you can make it a very comfortable, accurate, practical, and economical. By the way, that's a good deal you have available. My brother needs to buy a Stevens Long action, if you know where to get one at a god price let me know.
Here's a pic of a rifle I built off of am old-style savage (same as stevens).