People often complain of a gas smell in the cab. It shouldn't
have any, period!
As already posted, replace the rubber sleeves for the vent and
neck, the gasket at the sender, and the filler neck grommet if
it's all dried out and cracked, then don't over fill the tank
or let it set in the sun right after filling.
And......if the tank ain't leakin' you won't have any gas smell
in the cab.
dg