I thought Evan's comment on a separate "Which GT40?" thread was interesting and pertained to our discussion here:
Which GT40?
In Evan's words: "I like the fact the Spf's are factory built and have license from Safir and are th only cars legally that can be called GT40's from the factory.
Replica of the original but a damn nice one and legally a GT40."
Hmmm. That same phrase certainly applies to his Shelby Cobra replica.