Rear suspension too stiff

I just purchased a 68 Fastback, Formula S 383 4 speed car with what I assume are super stock leaf springs and QA1 shocks. Previous owner had homemade traction bars on it that were crap, so I put correct shock mounting plates back on.

QA1's are adjusted maximum soft, but still rides like the proverbial "lumber wagon". I don't mind a stiffer ride, but this is too much on the extreme side for my liking. I have no idea what the spring rate is on the leafs.

Here's the question - is removing one or two of the leafs from the leaf springs an option to soften the ride vs. purchasing different leaf springs? Leafs have 6 springs.

Looking for options before spending $100's on different springs.