The US does things differently. It's a state by state affair. I'm pretty sure if it's a legal vehicle then they have to give you liability insurance... or do in NC, anyway.
I've seen a locust or a seven just up the street from with license plates.
I've talked to a few kit car guys here and they said it was relatively easy license one.
Most of the time they just stamp a number on the frame that meets the state's requirements (do not remember the exact requirements
).
I also was told that there is insurance companies who specialize in kit cars that you get insurance from relatively cheap.
Just need some appraisals and such.
Check out Kit Car magazine in the back there is always some info. on how to insurance even for Canadia. ;D