I have an advanced adapter conversion guide that says Yes you can put a 23 in a 21 case, and it does not say anything about having to change gears. i will sell just the case for $100 ![Big Thumb Up :biggthumpup:](https://board.marlincrawler.com/Smileys/marlin/biggthumpup.gif)
alright what year of truck is that case out of? im trying to make a decision of putting dual cases in my pick up or putting a detroit locker in my 4runner.