
Above: Quicker pit stops with the same through-the-hood filler as used on the Spyders.
Some people call them LeMans or Monza style fuel fillers. These pop-top devices have been used on race cars since the 1930's.
You can have the same on your Ghia.

Above: Pop-top quickfill was standard on Porsche Spyders, and remains part of the car's charm and mystique.
Once the very epitome of racing, and famous still for its prominent use on kitcar Porsche Spyders and Ford Cobras, this type filler was
eventually outlawed by most racing organizations and replaced by screw or twist caps. The given reason was the cap might pop open in
a crash or rollover.
Our RetroRacing 1965 Ghia uses a 10-gallon JAZ aluminum fuel tank (foam-filled, no bladder) as seen in the image below.
A FuelSafe brand custom fuel cell for a 356 Porsche is also shown here. Very adaptable to an external cap.

Equipped with a MOCAL Aston-style filler (as in Aston Martin), and a 4 1/8" bi-metal hole saw, we cut an access hole in the hood
just above the tank's filler, and adapted the Aston filler device to the fuel tank's neck by the simple expedient of a hose collar and
clamps as seen in the kit Spyder's image below.

Above: Hose and clamps

Above: Here's our results. The nice thing about this is it's quickly reversible. Remove the quick-fill and the stock (legal)
twist-on cap goes right back into place, and can still be removed through the hole without opening the hood.

Above: The Aston cap we used from the MOCAL catalog
Sources
http://www.batinc.net/mocal-central.htm
http://www.jazproducts.com/all_products.html