8 1/4 rear end

could it have been a misprint?

I don't know. It was a 74 340 Duster. I thought the 340 wasn't available that year. But when you consider that there were a couple of 440-6 cars built in 72, a 74 340 car isn't out of the question. Anyhow, the article does say it has an 8 1/4 with strange spool. I was kinda hoping he is a member here, and could answer the question.