I get a fairly strong smell of fuel in the cab after I've driven my 67 c10.
I asked the Vintage Air mechanic about it. He says the vents for the gas tank could be plugged up....I've never heard of vents the gas tank. When I fuel up the tank has (typically) pressure built up and gets released when I take the cap off.
Are there actually vents that release pressure and fumes from the gas tank?