66 cuda weight

Hello. I just purchased a 1966 Barracusd Formula S (not running) from an individual in North Idaho. In order to transfer the title (to Washington State), I need something in writing that states the weight of the car (I believe something from this site would suffice). I searched the internet and have been unable to come up with something for this year (I can find 1967 and 1965). Any help would be appreciated, thanks.