"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.

No, just the two different rates they offer. I wonder how it would work w/a 225 on right and 200 on left.

We put them on our 67 coronet after switching from stock to super stock , to the complete cal-vert set up, mono/shocks etc.
The car is weight is 37-3850 dep on driver, we didn't pick up any 60, in fact we lost a little, but the car did go straighter,but developed that bounce after the leave, so now we are now working on the front of the car to see what or anything is the issue, we put new 90/10 race shocks that was recommended by cal-vert , ball joints, tie rods , with no help. now we have to wait n see for the track to open to try some new items different setup on camber/ caster torsion bar settings.
But at this time, money spent over the ss springs wasn't worth the effert and the end results, at this time, maybe after much trial/ error sessions, maybe we can get more out of the system,