I'm not as experienced performing this operation on a 16, but I have on a CVZ and Intimidator, both I/O, I'm sure OB powered craft have further complexity in this area. Most folks only split the halves as a last resort of a major rebuild. If your floor and stringers are good, not sure if I would perform this operation. Some folks have actually replaced floors without splitting. If OB you need to pull engine, if I/O it can stay. Maybe someone else can correct me if I'm wrong, but here goes.
1. Pull the three rub rail ends. One on the bow, then one each on either side in the rear.
2. Pull the rubber rub rail, remove screws along the aluminum rub rail to remove the aluminum pieces that hold the rubber.
3. In most cases, a second set of screws need to be removed that are hidden under the aluminum rub rail.
4. If a boarding ladder is in place, you need to remove it since they generally attach to both sides.
5. Using a small prybar, you can go around the seam and start opening the gap. Thin pieces of wood help to hold this gap open. Sometimes there is sealant, foam, or other material used to help seal this edge in place.
6. In most cases Glastron or previous owners have glassed in the connection between the halves at the rear. You will need to identify this connection and cut it. I have used knives, chisels, sawzall's, roto tools, and the new multi tools. I actually like the multi tool the best, cuts nicely and can get in tight areas. Head and cutter rotate to allow access, lays flat against existing glas.
7. There may be some connectivity involved if you have a console. My CVZ had tie ins to the front seats to the floor, and the Timi had a custom(aftermarket) pseudo console thingy that I had to remove.
8. Eventually you will need to disconnect wires, steering cable, throttle/drive controls, fuel and vent lines but I have always done this after preparing to separate the halves.
OK, so this is just the basics. Go slow and don't forced anything. You will be surprised how delicate the halves are when apart. Hope this helps, Michael.