I bought my Firebird Convertible new back on Feb 26, 1969. The car now has 251K miles on the odometer. It has DeLoreans OHC-6 Sprint engine, a 4 spd and most of the available options plus AC which I added during the 1993 rebuilt. Over the last 3 years the car has undergone a complete mechanical and body restoration which included replacing the suspension. When I spoke to Eaton I described the engine and options including the ride and handling package and the springs that Eaton supplied were perfect. The car set at the correct height and it was level.