not trying to be ignorant here but is there a benefit to the shocks with springs or are they as bad as air shocks when it comes to planting?
The shock upper and lower bolts were designed to carry the load of just the shocks only, not the weight of the car's rear as would be the case for shocks with springs or air shocks.
Using air shocks or shocks with springs risks bending or shearing the attachment bolts which are cantilevered and supported on only one end.
I added one leaf to each side about 1976 due to severe wheel hop on acceleration. This raised the rear body about 1.5 inches. Still good today with zero sag after 40 years.
