Re: how to tell which Savage?
You have a 10FP.
When looking for aftermarket parts/assecories, here are a few things to look at...
Trigger? Accu-trigger or old style? The reciever on the accutrigger is round at the rear, not always on the conventional trigger. The pre accu-triggers are flat.
Stock screw spacing, stagger feed is slightly shorter than inline feed
If you are going to change the bolt head for any reason realize that there are 2 different firing pin diameters, make sure your parts match up when ordering.