Stick car suspension set up

Hello guys and thanks for all the help.
I'm running a Centerforce Dual friction clutch.
The ET Streets are the SS not the R, I have heard the R is a better choice. I think I will go back to the DOT Hoosiers, had an old set from 10 years ago that I ran one weekend and they seemed better, they are in very poor condition so I tossed them and I had bought the ET's already.
What are your thoughts on replacing the shackles for sliders, do they work better?
Thanks again guys, appreciate all the help