[Rick 427 Cobra]

Contemporary uses an old Mustang filler tube (flat flange) under the Lemans cap. Install a standard gas cap on the filler tube under the Lemans cap. Under the body, run a vent tube from the Mustang filler throught a filter to the ground. This will prevent a full tank in the hot sun from expanding and spilling out on your paint The Lemans caps are not leak proof
Rick