I'm not going to tell you to go out and shoot it, but in general, these are fairly well-made guns and if they have been given reasonable care are still safe to use. You should have an experienced gunsmith inspect any old gun before you use it. Even if the 'smith gives it his blessing, I wouldn't use any magnum loads or steel shot.
NO NO NO. Please don't ever try to fire rifle ammo from a shotgun!
Stevens
This was my first shotgun, it was purchased for me by my Grandfather in 1980 brand new. This was my first shotgun, it was purchased for me by my Grandfather in 1980 brand new.
I have one that I bought new in 1981 or 1982.
Best left to a professional. Find a gunsmith
150-600as new
i sold one for $250 last year it was like new condition
Take it to a gunsmith to be sure.
Assuming you're talking about who the company transitioned into, and that would be Savage Stevens firearms. http://www.savagearms.com/
Made by Stevens for Montgomery Ward. It's equivalent to the Stevens 311. If fully functional, but not in like-new condition, it should be worth $200+ (retail).
Try Numrich or Bob's Gun Parts. They are both on the web.
Just sold one for $750.00/ like new