Super Stock Leaf Springs

Application? did you buy them new?
3800lbs Car. Mostly heavy B bodies or really heavy A bodies.
These would work very well if you A body is on the heavier side and you’re running a full interior, spare tire, etc… AKA - no weight reduction on the car.

FWIW, I ran these on my ‘73 Cúda. No issues. Worked great.
IIRC, the Cúda weighed in at 3675 dry weight, add myself and a tank of gas, coolant, oil, etc…. and your over 3800.