8 1/4 or 8 3/4 rear end in my Duster 340?

Wow, your good Green but it still leaves some question as to when they stopped using them in the Duster 340. The Duster was definetly not considered a "high weight" application. I'm sure the '73 brochure was printed in late summer or early fall of 1972 so maybe that's why they still stated the 340 comes with a 8 3/4 axle. Anybody out there with a '73 340 who can verify this question?