SS Dana Axle?

67 B-body Dana rears were not production line assembly in spring 1968. 1968 B-body rear were specifically called out to be modified.

The 67 B-body Dana is not the right width either.

The wheel offset was done to take care of the width issue.

Torrozzi requested quotes from rear rims with even more offset than were finally used. But they would not be done in time and were a lot more expensive. There’s where the roughly 1” was lost.