Leaf spring bushings

[blown69nova]

I purchased a set of DSE 2" drop leafs with aluminum front bushings and no shackle bushings. I need some advice from you guys as to what to use.
I have a 69 Nova (duh) with Hotchkis sm blk springs, KYB shocks, GW upper arms and all poly bushings in front. I'm also using a 1-1/8" Hotchkis sway bar in front. Right now I have replacement multileafs from a local spring shop and KYB's in the rear.
The front suspension feels pretty good, but the rear is just too stiff for me. I have no idea what the rear spring rate is, and I doubt the spring shop knows either. As I stated previously, I have these DSE springs laying around that I want to install, but am not sure about the bushings.
The car is 95% street and 5% strip, I want great handling but not a harsh ride like I have now.
Thank you for your time, Steve

[David Pozzi]

I'd talk to DSE about the ride quality but I'd try the DSE leafs but with a stock front bushing. I'd try some Bilstein shocks, the KYB's are rougher riding.