I wanted to carry my Power Tank in my 4Runner instead of having it on the outside somewhere. Since my 2nd gen does not have the cool roll bar (yeah, I'm jealous of you 1st gen guy's) like the 1st gens do, I had a local welder fab me up a mini roll bar to hold the fire extinguisher type bracket that then holds the C02 tank.
It turned out real good. If I could do
it all over again though, I would have gone for a whole roll bar like the
1st gens do.
I have a cargo box also in the rear,
and I could have made it bigger if the C02 tank was up in the air on a
full size roll bar instead of on the floor like my current setup.
I use the Power Tank quite often to check
my tire pressure about once a month too instead of firing up my little
noisy 12 V compressor. Plus it's nice to be able to fill the tire fast.
When airing back up the tires from 20
PSI to 35 PSI, it takes just a few seconds compared to a few minutes or
more with a compressor.
The Power Tank is way faster than any
service station compressor to.
Below are a few pictures of the installation.
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I have a video here
of me using the 1/2" impact wrench to change over too my winter tires the
fall of 2001.
To air the tires back up I just bought
this cool gauge from
Griots Garage.
I mainly buy my wax and detail supplies from them, but they have a lot
of cool gadgets you won't find elsewhere.
What's cool about the tire gun is it has
a connector on it that stays put on your tires, and you only have to use
one hand to air back up, or bleed out air. The other end of the line hooks
to the C02 tank, or any air source for that matter.
Squeeze the trigger half way and it bleeds
air out. Squeeze it all the way and it inflates.
I have not used this inflator/gauge yet
for trail use, but I will try it next time I'm out instead of using my
screw on type from Sun Performance that are the same as the Oasis ones.
This way I don't need to turn on the C02
tank, I would just hook up the Griot's gauge and bleed each tire down to
the desired PSI. I think this may be even quicker than using the screw
on deflators since I won't have to put a gauge on them afterwards to check
them since the Griot's one has the gauge already in it.
My setup is also featured on Power Tanks "mounting page".
For a real good review on the Power Tank, see the article on Rock Crawler's forum & Tech site.
If you have any further questions, please
contact me,
Corey
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If you choose to do this mod good luck,
and if you have any questions 
(Corey) on the Yotatech Forum.