I ordered the leaf springs today.
I had a guy with one of these cars tell me a while back to use trailer springs.
I found a set of 26" springs with a 13" eye dimension.
They already have urethane bushings and the assembly bolts come with greasable zerk fittings.
I had asked a while back if anyone knew a reason not to use the leaf spring sliders on the rear of the springs rather than shackles. I've never heard anything...I guess as of now I still am planning on using the sliders.