Brake hubs

The 73-76 drum cars ARE small bolt pattern but the upper control arms were converted to the large BALL JOINT.

In doing so, the spindle might have been different. If the spindle is different, the hub may also be different. I'm uncertain about any of this. Your drums are visually VERY different than the 68-69 a body 10 inch drums I pulled the hubs off (no fins on mine).

If you have a ball joint socket, try the large one (like you use on B/E body) and see.

Most people (including me until recently) didn't realize that even the SBP 6 cylinder cars got large ball joint ucas after 72.

BTW, there's a post here looking for the big ball joint ucas. They are still bringing very good money.