70 Nova with Landrum split monos, sliders, And Smith Racecraft Assasin bars. Currently using Calvert shocks. Cars works well but trying to see if I would want to go to a better shock with radials. Goes in the 20's for 60' now. Leave well enough alone? I know there is a lot of unknown info here but just looking for a general idea. How fast have some been with similar set up?