The 84-88 have the Aluminum plate that goes over the top of the spring end and the shock T bat mounts to that.
89-91 I haven’t had one so I don’t remember. I do know they are a little wider than the first year and the bakes are a little different
92-96 the front A arms we’re converted to bolt the Shock directly to the a arm, they have bigger brakes that the rest with a different rear caliper, and they are the widest with the best handling.
This is a 86 vette suspension on a 32 roadster frame, we built two little adapters to fit the QA1 coil over shocks to it.
