A 440 A-Body... that can handle?

I had two sets of factory A-body heavy duty (340) springs. I took them apart and used two of the longest sub-leafs, two of the second longest, and one of the next longest. I built them for my old 67 GT hardtop that I put the 440/4sp into (the drivetrain that is now in my son's 67 convertible). I built these mainly for stance, but they work ok.