SIV -- ^^^^^^^^^^^^^^^^^
I appreciate your work - but I would NEVER EVER EVER vent GAS FUMES into an enclosed space -- and especially where you have light bulbs/turn signals/brake lights/wiring....
You get a leak in your vent system -- hit the brakes -- and see ya sweetheart!
Of course - I'm also an internationally licensed pyro - so I think SAFETY first - which is why I'm still alive to type this.