Wow. I got Historic plates here in AZ just by asking for them, I think here they just go off of the age of the vehicle. (I saw a mid-80s Mustang with them once!)
Antique insurance, on the other hand, you need to work a little to get. I'm still waiting to put my bed in before I get mine appraised in order to get that. I think there are also restrictions on how much you drive it and whatnot.
Good luck Chris.