If you made this site look and feel like the old site and kept all the new bells and whistles, you'd have the best of both worlds.IMO, Part of your success of the old site was the way it was laid out, the picture like an album,(who we are and what we do or did), the colors (not grey), the new content(easy to access), and I think you should build on that success not just change to this, you may not get the same results. This is important to your sponsors, users and new comers of/to the site. Reading some of the comments from the old site calling it "my old friend".
I.E. 69 Camaro with all new engine, trans and suspension.
J~