From memory with pictures...
1.Remove the ambulance doors (with or without the hinge up to you. I just unscrewed the hinges from the hard top side altogether and later removed them from the doors.
2. Remove the bolts attaching the top to the windshield.
3. There are 2 bolts, one on each side, that hold the bars for the top in the door jam area. Loosen them. The picture is showing the screw from the inside but look for it about half way down from the inside of the tub.
4. Begin undoing the bolts around the fiberglass top, example: the ones with the arrows. There are more all the way around from the inside of the landcruiser so just make sure you get them all. Then the bolts with the circles, those you have to get from above the metal rail, i.e. the headliner side whereas the others you can access from the bottom of the rail. I think some people miss these and the task becomes harder.
Don't forget these on each side
5.Now you're ready to separate the fiberglass top. Note: you will also be taking off the side bows that attach the hardtop side to the windshield. If you want, you could remove it while you are doing the rest if so you need to unbolt the bolts from the inside of the bows. These will need to come off either way but I removed mine when I already had the fiberglass top off.
The picture shows the holes where the bolts screw in from the inside. This part on how to remove them seemed a little tricky, but it really isn't. You'll see a ridge where it looks like the piece slides in and you think you have to slide the piece out but it isn't about sliding it, it really is more like separating a clam if that makes any sense. You'll figure that part out but I don't think I'm explaining it well. See the next pictures for better shot.