Jim Hycner posted a picture from his original 26 Tudor of a burlap gasket which seals the fuel outlet opening on the firewall. Original post here: http://www.mtfca.com/discus/messages/331880/354242.html?1365851248
He mentions there are two rivets holding the burlap gasket. I can see what looks like the head of a rivet at the lower left hand corner of the fuel outlet.
So the questions are: Is this one of the rivets and where is the second rivet located?
Jim's car is a 26 so it does not use the cardboard behind the firewall. It occurs to me now that this is the reason for the cloth seal here on those cars.
Has anyone found a burlap or cloth seal around the fuel outlet on a 27? Mine has the rivet hole below the fuel outlet but maybe it is used to rivet the cardboard pad in place?
There is no Ford part number for a canvas gasket. IMO that gasket was owner added, the small hole below the cutout for the tank outlet is to place the threaded hook that holds the over flow tube to the firewall.