Gear driven, top shift case. I bought the case dis-assembled with a set of Marlin 4.7 gears to go into it. Finally started putting it together and realized I'm missing the hi/lo shift rail.
EDIT: Might also be willing to take a forward hi/lo shift rail so I can chop it down to size per this post on Pirate
![](http://i188.photobucket.com/albums/z138/89trailrunner/top_shift_conversion.jpg)