that is why I asked for pictures in the beginning Savage did to many different setups over the years.More considerations: Is the receiver machined full length and the box mag plugged or is the receiver machined short and the box mag unplugged? Some were made this way.
These days I just start with a new 12FV from CabPro Shops, with the top bolt release and Accu Trigger.
this should be a long action 5.062 bolt spacing with only enough of the action milled out for the short internal box and extended bolt baffle
they come in standard shank but I have a 112 that is large shank.
even know this is set up short action it will need a long action bolt head and switch to the small firing pin and cross bolt.
pictures will be extremely helpful