[William]

In those days Chevrolet was touting "computer-selected" springs.

Spring selection was based on desired "trim height." There is a chart in the '69 AIM. There is no mention of big-block or A/C; it relates to tire size and std or G31 rear springs. Z/28 has its own line.

In other words all 1969 Camaros with, for example, F70 x 14 tires and standard rear springs should have the same trim height regardless of equipment. Cars with the same trim height may have used different springs.

The Camaros you see today have all been messed with. Correct trim height is difficult to dial-in on a restoration due to the limited selection of service springs. We did a COPO that sat far too low. Dismantling the carefully painted and detailed suspension to change springs was no fun.