Specifically for CALIFORNIA owners.
I'll say this one more time, if you have a pan based car (Speedster, dune buggy, Lamborgini, etc,) and it is registered in CALIFORNIA as a xxYR Volkswagen, it is ilegally/unlawfully registered. It should be registered as a Special Construction (SPCN). It does not have to have one of the "magic" SB100 numbers to do that, "all" (basically) it needs to do is pass smog for the year of the engine.
So if you have a speedster registered as a '64 VW and have all the smog required in '64 and an engine that could pass for a '64, you can be legal with out much trouble. ETC....
That is from the second highest person in the FRAUD Department at CA. DMV. I don't car what your builder tells you or promises you if it is "you can register this as a xx VW" it is either misinformation or misdirection. IT MUST BE REGISTERED AS A SPCN!
It is the same for frame cars such as mine too. I was registered ilegally and received a letter in the mail from DMV Fradulant Registration.
Personally, I don't care how you are registered and DMV may never catch you. I doubt they spend much time on VW based cars, I do know they have a thing for Cobras. Based upon my "experience" and discussion with the DMV person, do not have a photo/article placed in a magazine, and other public venues. They have been known to prowl/lurk/ and even contribute to specialty car forums and boards. Don't believe, ask the Cobra guys or the Spyder guys, right Larry?
You know, you will probably never be caught. I was, and if you are, don't hate the DMV, you broke the law. Oh yeah, and if you under valued your car when you registered it, saying "it's a 64 VW Bug, paid $500 for it." When in reality, the car is a Beautiful 2004 X-brand Speedster that was really $30,000, prepare to pay all back taxes and license fees + the penalties that compound.
SEMA is working with other hobbists to get a better understanding and create a more fair and robust system in all states for "kit" and specially constructed vehicles. Kit Car mag just had an article about it.
Another comment made by the "Fraud Lady" was "don't count on the DMV employee knowing what they are doing." "They usually don't know one car from another and some do not even go out and look at the car they are registering." "It is the owner/registrant of the car that has to know the laws, and if a mistake is made, the registrant/owner is responsible"
So if you go out with transfer papers from another state that says 57 Porsche and it gets registered that way, and it is not a 57 Porsche, it is on the owner.
I really do not want to scare anyone, only inform, but I was caught and shown the error of my ways because I had an initial registration from New York.
Good luck and as Enco fuel used to say "Happy motoring"
Don't be this guy!