John I think you maybe miss typed the year for the later 2nd strut bars.Should be 92-94 when gm changed the bolt pattern for the front struts that are wider apart.Just adding some info so those who might not realize the 86-91 use the same strut bar with a closer bolt pattern and will Not fit a 92-94.However the rear sway bars are the same from the 1st to 2nd and no variation on brackets,or hardware and fit identical.
The actual bolt pattern is the same diameter, but it's clocked differently between the years.