440..350 hp E85 or E86?

Hello folks I have a quick question I recently found this add online showing a lovely Newort 70 or 71? My question is this most Newports were born with the 383 but this was a special edition with the 440 350 horsepower so would the engine code be E85 or E86..whats your thought folks and any idea roughly how many coupes came off the one with this powerplant...thanks
Author: big block