Quote:
Originally Posted by Hazieview
That's a very good point for those that have an AC or heater. My truck has both the AC and heater Core removed and blocked. Very good point in regards to safety.
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I read that other thread and don't really see the concern IF, and it's an important if, there is an airbox that is sealed to the firewall. Were someone to cut a hole in the firewall to let cool air in near the carb then there is a high likelihood of contaminating the air that the heater/AC draws from. If the hole is sealed to the airbox/carb, then I could see that some gas fumes could conceivably meander through the air filter, into the cowl trough, and into the cabin. But unless you're running the heater with the engine off, there's not a way to draw contaminated air in. And when both the heater/AC and the engine are running, both are a source of vacuum and have an sizable amount of outside air to draw from based on the size of the plenum.