Since this topic has been brought up...
I am in the process of preparing my front hood for the cutout.
Of course, my car is completely disassembled.
I will be doing the GT-style through-hood with the finned Blau cap. What I am needing is measurements from the edges of the hood (rear edge and passenger side edge) to the center of the fuel filler hole on the stock fuel tank.
I received dimensions from Chappy (iamchappy) and Eric Shea and the location of the hole from the passenger edge of the hood is the same, but the location of the hole from the rear edge of the hood differs by about 1/3 to 1/2 an inch from both of them.
Chappy gave me measurements to the center of the filler.
https://dl.dropboxusercontent.com/u/3279713...4/hoodhole1.jpgEric gave me dimensions to the edges of the hole and stated that the cutout is 4 7/8 inches
https://dl.dropboxusercontent.com/u/3279713...4/hoodhole2.jpgA third measurement might sway me one way or the other.
The other option for me is to assemble my car and then do it (but everything is stripped and ready for repaint).