1967 Cutlass Rear Spring Suggestions

[67w30]

I have a 67 Cutlass that I have installed the tall spindle and global west upper and lower arms. Front spring is a Hotchkis 1in lowering spring, I've had the hotchkis rear 1in lowering spring but it rides too high for my liking. I bought a set of Global west rear 1.5in lowering spring and it rides too soft and too low!
Any suggestions on where to get a median spring?

The car has a Moser 9in housing and global west rear arms with Koni Shocks all around.