MacDaddy, welcome. For me, I would suggest selling the Rem SA in 7-08. There are lots of BR people looking for this action and will pay a fair dollar for it.
You can then buy a short or reg. action in a magnum bolt face and save yourself a lot of trouble and additional costs. In fact, I would get a savage in the cheapest model available in a 300 WSM
. Get a better stock, tune or replace the trigger, spin on a barrel to suit or use whats there to start.
You now have a rifle that is potentially very accurate, will feed the WSM case and can be used single shot too.
The costs of reworking something these days is getting too high to be worth it. Get something off the rack that works and tune to suit. It will be cheaper in the long run.