[John]

Rob, check with David Borden over at ffcobra I'm pretty sure he did his GTM as a SB100. There are others, but he comes to mind.
Under SB100, you don't actually register the car as a 1960, they just use that smog spec. When registered, your registration will say 2008 SPCNS,(or what ever year you apply for registration). It's kind of strange, there must be hundreds of different home built cars that don't resemble one another other in any way, and with different makes and types of power plant, but they are all called SPCNS. John