You really should leave this to a trained gunsmith.
If you are not trained to do this, I recommend you do not try it. Chances are better than even you will be taking a box of parts in to a gunsmith and that's not good.
A lever action rifle chambered in .308 Winchester.
100-500 USD
100-1000 usd
100-400
You do not want to try this. Find a qualifed Browning gunsmith.
100-700 usd
100-1000 usd
Need a detailed description of all markings, finish, condition, etc..
500 USD
No way to answer without more information on both rifles.
You can contact Browning Customer Service through their website, or look up date of manufacture on same website.