Van fuel leak.

Hi, My van leaks out the filler neck on corners, I have seen others with the same problem. How has the problem been fixed, all or any ideas welcome. 

Its coming out the cap and running down the paintwork.

I made a new cork gasget, baybe thicker cork. I have had a number of cars around this era and it seemed to be a common problem. The panel needs work around the filler and I was thinking of fitting a modern hidden filler with a flap in the neck. Has anyone done it?

I Thort I should reply with the 'hidden filler' arrangement. .i did this cause I think the van filler looks very " oh quick let's just stick the filler about here technique" by the lazy forgetful lads at the Ford plant... Even if the mk1 escort van was a cheap load lugger !
What i did was buy a filler door from a TC-TF Cortina sedan and then made the recess to suit

Here is the finished product. . The door opens by pushing the front part of the flap in.. it's also spring loaded and adjustable. The shape of the curve is just about spot on too !
I'll be running the van on LPG so i didn't need to keep the std tank stuff.
Cheers

this is what ive done,

 
ive put a XR - XY Falcon spill tray, you need to measure the distance between the four screw holes on the van and redrill the spill tray to suit, you will need to put spacers between the spill tray and the two screw holes facing the front of the van to make it sit flat, as the escort filler neck mounting does not sit strait to the body

the black circle is pen, i did the whole car to show me where all the dents are so when i sand it down and gets covered with dust, i can see where i need to strip back to bare metal to bog, all dents are pressure dents from people leaning on the car no hits apart from passenger side front gaurd
 
also about the fuel caps EH holden fit perfectly, that pic is a old one i have now got a larger cap from a EH to fill in the spill tray and no leaks

thanks mate, i have sold those wheels since that picture, they were 15in Saab wheels, i have now got four spoke dragways and BF Goodrich tyres, 14in rear 13in fronts
 
 

Changed the tank but still have problems. The replacement is a bit rough inside and the sender is frozen. So looking for a tank in clean condition, anyone got one they don't need.