Okay I am installing a new gas tank on my 64 fairlane, and seeing that a new fairlane tank is pricey I opted for a mustang tank. It is shorter and wider than my original tank. The filler neck is positioned slightly different too. The back end of the tank would be resting on a lip on the fairlane trunk floor? Although the other end would be snug against the floor. Also the fairlane filler neck is covered up so moving the stang tank any farther backward would require cutting out the filler neck area? Let me know if you feel this setup would work or any suggestions you might have, Thanks!!