I don't understand why you would put the wrong SS spring on your car to soften the ride .Why waste your time and money ? SS springs are designed to work in a specific way with a specific weight vehicle .They are not supposed to be soft riding they are supposed to plant the rear on launch .If you want a soft ride run stock springs arced for whatever ride hieght you want . If you want to launch the car at the track buy the correct springs for the weight of your car , get the correct shock for that setup , add a pinion snubber and go racing .
PS second gen Abodies are 3000-3200lb cars not 2800lbs .the 2800 lb springs will seem to work for a while but the extra weight of the vehicle will pound them soft in pretty short order .