It depends on the condition of the gun. While 71 winchesters are collectable one with poor finish and after restocking loses a lot of value so rechambering to AI might not hurt the value as much as doing it to a pristine example of a 71...
![Wink ;)](https://www.gboreloaded.com/forums/Smileys/default/wink.gif)
Also if you ever try to sell it you'll narrow the buyers market by rechambering.
I would probably leave it alone if it was me..