"And to help piece it together: Calvert monos are 200 and 225 lbs spring rate and my own SS springs are 160 on the right spring and (I think?) 125 on the left."



Are you speaking of the front vs. rear sections of the mono's? As far as left to right, I believe they are the exact same spring on both sides. When I installed mine, I inspected them very carefully for a L or R, or a different weight rating, they were both identical, with the exact same part #. Any stagger in this system is designed to be handled by the bars.