You need to look up the business of water fording in the fronty, the air inlet is in the front wing drivers side and low down in relation to the rest of the vehicle, deepish fording will kill the engine cost you big bucks, read the tales of woe here.
Easiest mod and least cost is to look behind d/s headlight, you will see a short fabric/rubber pipe going into the inner wing, pull it off measure the size of the inlet to the air cleaner box, go to a local drainage plumbing pipe centre and buy a length of the same size spiral reinforced plastic pipe. Enough to go from there to the bulkhead where the wiper motor etc is. Fix it on with a jubilee clip ( you definitely dont want it coming off) and route it up to the bulkhead, high up under the bonnet, fix it with a few ty-wraps and you are safe up to top of wheel height in water as far as the engine goes.
There are other issues going in deep mud or water, like wheel bearings prop shafts and axles which all need attention before and after these exploits, particularly the diff oils need changing after being under water.
This applies to all 4x4s not just frontys, you can not wade in deeper water or mud with impunity unless you prepare the care before and service it after such activitys. Rear wheel bearings are expensive and almost impossible to change unless you have a well equipped work shop and the knowledge. Fronts are a lot easier to do and not so expensive, the seal round the CV joint fails and lets mud/water into the bearings from the back of the hub, these need repalcing regularly if you go aff road, or you will have the expense of wheel bearings and Cv joint to replace. Regular looks and fresh grease help a lot in these areas.
Mike