I'll take a good look at the explorer intake and see just how much it resembles the GT intake.
If you put the right "H.O" plate on it, you would have to look real hard to notice. I mean it's different, but you would almost have to know that it's not a GT intake to notice.
Here is a good resource.

The Most Complete GT40 Intake Information Page
The "Original" GT40 Intake As our foxes get older and more collectible people are starting to look at what performance parts were available in the early days and this post...

Kurt