I have to agree, the carbon cannister was one of the few emissions-era devices that didn't negatively impact performance aside from a little extra weight.
I actually pulled one off a parts car last week and considered keeping it for this reason, but the nipples were broken off so I tossed it. I've debated parking in my attached garage simply due to the fume issue, and the possibility of fumes making it downstairs to the pilot light. I hadn't thought of using the carbon cannister for that.
