Reverse is all the way right and back if you don't have any of the shift linkage connected. It's hard to get it into reverse though since you have no leverage pulling on that tiny piece.
Edit: Just saw you had the linkage attached. What you feel "blocking" it could just be the normal resistance you get when shifting into reverse, again with the transmission out of the car it's going to be hard to shift because there is less leverage.
Last edited by 3coupe; 12-21-2012 at 08:19 PM.