Hi Steve,
Depends on your concept of easily. It is easier with one seat out, better with both seats out. The seats are easy to get out. The seat(s) out make it easier to access the four screw holding the shifter boot to the body, lifting carpet to access. The screws are a large head cross recess screws with nut plate secured to body. The screws can be removed from the top side. Once the boot is loose and slid up the shifter, there are two bolts holding the shift handle to shifter. These are then access agains from under the carpet. The trick is to not loose the two springs and spring cups when pulling the handle out. The real trouble starts when re-installing the handle that the springs and cups fall off prior to fitting into the shifter. Not too bad, you will want to grease up the spring cup and shifter contact areas, so a little messy. Then reattached the boot, put carpet back down and re-install seat(s). That should cover most the process to swap. Is that easy?
Best of luck
Cory