I followed this write up for the breather vent
How To Waterproof Your Transmission - GETAHELMET.COM
And this link for the snorkel.
TJ "Hummer" cold air intake
Took about 2 hours to complete everything and cost about $200-$215. The spectra intake was the most at $150
I had the hood submerged and still made it out. Although I got water in the transmission and had flush it with kerosene...It wasn't much but enough that I had to flush it.