This is how I decided to provide access to the fuel tank etc. I got an aluminum hinge from Aircraft Spruce and riveted it in. Its very flexible, but still groans when I open and close the hatch since the floor is not perfectly level. Hopefully it will be fine since I shouldn't be opening it much.
MkIII Roadster, IRS, Levy Racing 351w Mass Flo EFI, TKO 600, Grad. Oct. 2006.
Type 65 Coupe, IRS, Levy Racing 347, HD T-5, Wilwood brakes, Grad. May 2010 (sold Aug 2012)
You have the right to life, liberty, and the pursuit of hoppiness!