[Irish1941]

The roll bar is factory correct for '75 (1st yr for mandatory roll bar) but shoulder belts never went to the bar.
There is/was a plug on the hardtop for shoulder belts but very rare to see them from factory.
If you think about it, roll bar is only as strong as what it is bolted to.
And ski nailed it. Later Sub seats and pre '90 Blazer/Jimmy seatbelts.