Snorkel for my Land Rover Series III

I want to know if someone has a guide on how to make a snorkeling for my Land Rover Series III I plan to do it with PCV

It is very easy only looks for the box if it has the air defection fin is already if you do not do it and put elbows that leave direct you have the side or back to pierce the capo and take it out, but the best shape is to perforate the guadafangos and take it out by the side of the windshield and upload it through its edge nothing from the other world.