Hiya Jack,
Love the site, great information gathering on your part. I have only a few suggestions:
Center your Menu, they always seem to look nicer centered.
Format your image spacing on your main image of your corvettes at the top so that they are uniform from page to page. They change for almost every page so keeps making the page stretch or shrink vertically when you change pages. If you get this so it's the same for each page that will flow a lot nicer for your visitors.
Center your Logo at the top, once again just something that makes it look nicer.
Center your Contact Form. With the menu at the left and the form at the right (Firefox 8.0.1) it's a bit quirky looking.
You have a wonderful site here though, mostly just centering stuff that I see could be adjusted, but that's minor details compared to what you've already accomplished. Well done