You'd better be prepared to do some serious modifications and dump some money into it then. As someone who drives a '94 Miata with a nice suspension setup (Flyin Miata springs, Bilstein HD shocks, bigger sway bars front and back, added chassis bracing, roll bar, and summer performance tires), I appreciate how well the S2000's handle. They have plenty of power for their size, and great handling characteristics. I also have a 71 Dart ... I would like to improve it's handling, but I know that unless I dump SEVERAL thousand dollars into the suspension, it will not handle anywhere near as good as my Miata.
You have to remember that the technology that is in his S2000 is decades ahead of what was used in our old cars... I can understand and appreciate your desire to do this... but it won't be cheap or easy.