[Mulv]

You will have to pay sales tax as the exemption only applies to cars purchased from private paties. That assumes that you did not already pay the tax in Texas, if you did you need to have itr refunded by the state of Texas. That assumes that you did not drive it or get Texas plates.

Go to the MVD office, they have a book that has pictures of all kinds of cars. The Cobra will be in there and if it looks like a duck in AZ it is.. They will register it as a 64 if it is a slab side car or a 65 if it is a 427 car. Either way, you won't be there for very long. You need to have a vin certification which they do outside first....

Plates will be about $25- as they will call it a 65 as opposed to the $500 - $1000 that they should be as it is a new car... It is all very simple and straightforward..