76 has no bracket, because it has the rockin' solid formed headliner.
The 76 has all the spikeys and holes (to hold support rods) as a 74 does to hold a fabric headliner. This pic is of 74 Marin County showing what I'm talking about:
The 76 doesn't need them, since it has the ultra-cool formed headliner, but it was interesting that those formations were still there. mbmopar was telling me a story that his 74 RCMP had "dual zippered headliner to access roof holes for lights antennas", and you couldn't easily do that with a solid mounted headliner.