For future reference, when looking up Auto parts anywhere, left and right hand are considered from the point of view of the driver sitting behind the wheel.
Driver side and passenger side are ambiguous if you consider some vehicles have the driver side on the right, like British cars, model t fords, and mail delivery vehicles.
While I agree, it's better to ask than assume.
Yes, both have the filler neck on the passenger side.
The picture is of a 1940.
Im having difficulty locating an aftermarket replacement. Seems like the Chevrolet originally was top fill vs a fill neck sticking out like the GMC. The GMC Doghouse mounting bolt holes are also narrower center to center than the Chevrolet doghouse.
