John,
To answer your question, if you sell the car in this state, you will have to get a SB-100 number. Buy a lottery ticket. Your odds are about 1,000 times better to win that than getting one of those numbers unless you know someone. You can sell the car out of state to a person in any other state and they can register it there. Otherwise to be legal here, you have to register the car as a 2005 home built or what ever and then go to the smog referee and meet the emissions requirements for whatever year block you have in the car. That or the SB-100 number is it.
Terry,
You are correct about SD meaning sedan. The KS is a code that the DMV uses to determine the value of the car for license purposes. Now if he gets a SB-100 number it will have to show it as 2006 as they are gone for this year.
Ron
