Soft top needs a channel on the top of the window, since you have a hard top then the it would need to be removable. The old fj40's that were factory soft top this channel was welded on. The other part is if this is a factory soft top then it would have the fasteners on the sides of the fj40 that would get in the way of the hard top. They would have to be taken off each time to switch, they would just unscrew. So it is not a real big deal to switch back and forth. Reality is in FL you will likely never put the hard top back on if you have a nice factory style soft top.