I would assume going back to regular springs would soften it and I would assume that all A body springs are the same end to end but iirc some (SS) the center pin is slightly forward or back from normal which is gonna locate the axle & actually the shock being vertical is giving you the most dampenening. OE +1" get recommended alot. I bought a 65 dart roller with 003/003 SS springs & they needed shock extensions but when done it rode high and tight/real nice.