This is probably a unique issue and I'm looking for ideas on where to create an outlet for air flow through the interior. This is on my non-AC 79 coupe with the outside air vents in the dash. Since I have used a trunk mounted fuel cell and sealed off the interior with a rear firewall and plugged all the gaps with fire proof foam, the interior is pretty air tight. The only way I can get any air coming in is to open a window to let it out. I assume that in a standard state, these cars leak enough air out through various parts of the inside to create decent air flow from the dash vent. Or is this typical? It would be nice to be able to close the window at highway speeds to lessen the noise.
I'd like to figure out somewhere to create outlet vents so I can roll up the windows and still get some air through the vents. Obviously cutting holes into the trunk area would be defeating the firewall, so I would like to figure out where else I could accomplish this without it being obvious and where I'm not assaulting the paintwork. The other concern is possibly allowing a backflow of dirty air into the car so the vents would ideally go to a clean air space. I have thought about some flex hose to route the air to the back end of the car somewhere too. I have a length of 2" high temp vent hose that I mistakenly ordered instead of the 3" I needed for the brake ducting.
Thoughts and ideas from those who are intimately familiar with the construction of the fox body are welcomed.
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