Just got ERA154 registered in Central Florida as a 1965 Cobra. She even asked me the weight, which I am sure I lied a little at 2400 lbs. Got the sky blue antique plate, piece of cake. Since I didn't have a bill of sale, only the Oregon title, she took my word for what I paid for calculating sales tax... ;-)
You don't have to have the car there, as long as you have the VIN verified, and there were a number of ways (I had a cop friend verify).
form:
http://www.flhsmv.gov/dmv/forms/btr/82040.pdf