Swaybar brackets

Be careful. If I remember correctly, the 1972 factory sway bar runs through the k-member whereas the earlier ones have the sway bar in front of the k-member. I think the tabs that mount to the 72 lower control arms are different or are located differently than the 71 and earlier.

No, the 1972 A-body is the earlier style with the K-member running on the outside front. Same for 67-72 K-members.

The through mount sway bar for A-bodies is 1973 to 1976.