Looking for advice. I am restoring a 75 late bay single cab. The fuel tank has two vents on top - one has been blocked off (with a bolt and a hose clamp). The other connects to a metal pipe line that runs across the car, just behind the tank, suspended off the underside of the load bed, then stops inside the side vents in the body (in front of the rear wheels). Presumably fumes are meant to vent out the side of the car. In busses I've had a long time ago the fuel vents went into a charcoal canister that presumably filtered the fumes and vented into the top of the air cleaner box. On the single cab, should both fuel tank vents be open? Should they flow to a charcoal canister or do they vent straight out the side like the current one? (The metal line that's there looks original) If they did originally run through a charcoal canister, how important is it to reinstate that? I have an old charcoal canister from a donor car (a 76 bus - it's a ) which I could probably rig up. Would it still be OK to use after 44 years? Where should I mount it and which way up does it go?