It could be a 110 chassis, but it is probably a 109 coil spring conversion chassis. The seller should have provided that info.
For the parts you are concerned about it doesn't really matter. A series bumper or bullbar will fit and so will a defender bumper.
Most snorkels involve at least a little modification and cutting. If you have a non standard truck that just means you can expect it to be a little more work. Just make sure you get one plumbed for dual carbs. A stage1 kit would probably be the best starting point.