you won´t get any water in your air intake.
but without changing other things you will not be able to go through that deep water for that you need a snorkel.
the axle and tranny air hoses have to be extended, many electrical connectors have to be isolated, the alternator has to be saved. and many more things.
a snorkel looks good and most people will thinkl that you are a great ofroader if you have such a thing. but most people (here in europe) have it only for show and not why they need it.
there are many other things that are much more neccessary that a snorkel...