Jake,
Welcome aboard too.
You will be surprised at how many members grew up watching the racing taking place in the 60's and 70's, including the GT40s. It is that inspiration that takes hold of a person that draws that person to want to think back in the day, kind of remembering the "good old days".
With the movement towards resurrecting the GT40, many replica manufacturers have developed the cars you see on this web site. Depending on a persons finacnce situation, a GT40 can be had for a reasonable amount, but everyone has their own views on what they want in a GT40.
Take some time to view some of the builds in progress. I think you will find this web site has some very talented craftsman, which when the time is right for you, will offer information and advise upon your request for assistance.
As Bill D said, you should track down some people in your area and have a look at a GT40 in person. That will definately hook you if the hook has not already been set.
Cheers,