the spirit of heat, the old 1920's ish racers is great. tough to get right, as the Heat physics seem to be all or nothing not as smooth as N2K3 or GPL, but what is?
but this really tranlates the VTA-vintage trans am mod so very well, it sounds and looks great and drives a breeze...
http://www.texasspeedracing.com/files.shtml
http://home.earthlink.net/~cruise_ctrl/index.html further down you will see the Spirit of Heat