Each state is different.
Contact the DMV for Florida and hope there is no voting.
Seriously, tell them you have a car you built, unless you purchased it finished. Then ask the person what it would take to put plates on the car and be able to drive it on the streets. Strange as this may sound, I have heard that some states will issue "show car plates" or something liek that to move a car around but not on the street.
Hope this helps.