Offroadr35,
Turk is far more up on the latest developments than I am, but you would use SB-1578 for a used completed Cobra bought out of state. This bill also uses the same 500 numbers allotted by SB-100, but was written to let people legally buy and register Cobras from out of state so they will be legal. Also to make sure you pay all the taxes on them. If you bought a Cobra from Texas for example that was registered there as a 1965 Ford whatever, by using SB-1578 you can register it in Calif. as a 1965 Replica and the rest is mostly the same as doing one under SB-100. As for the proof of insurance question. I believe that you will need it before the DMV will give you a license plate. I am not sure if you have to have it just to get the SPCN number. Turk has been through this lately so he is the one to talk to about the new things. People trying to avoid taxes on a $50,000 dollar car by declaring it's value as $20,000 have kind of made a mess of things. I can't say for sure, but I believe the DMV here not only looks at all the receipts and adds them up but then checks with your insurance company to see what you have as a declared value. The woman that I talked to told me they would prefer all the receipts be together and not a seperate one for each nut and bolt. Mainly all major components and what they cost when finished. And now of course the labor. Turk, just how do they arrive at a number of hours for that as some people can put a car together in a fraction of the time it takes others. As for the tax issue that is a mess. Better to just pay them on all components than argue that you have already paid them on some things you bought. Just my opinion based on what I have seen happen here the past year.
Ron