If your other Savages are Stevens and realatively new they will have a slightly different trigger, 2 screw instead of three screw adjustment. There is such a thing as a "J" frame, It was made when Savage used long action 110 rifles with mods to the bolt and magazine to handle short action cartridges. Yours is a real long action with that .270. Receiver will have a flat rear receiver requiring a different scope base than later all round recievers. Weaver still makes them, I have one. My old "J" frame has a standard 3 screw Savage Trigger on it.
El Lobo.