the superstock springs of yesteryear worked , w/o pinion snubber , my old hemi belevedere tore up every pinion snubber we put on it . The springs made in mexico a few yrs back sucked , dont know about now .
Removing the pinion snubber helped me a lot. My car would hit so hard it bounced off the snubber and unload the tire. I was all over the place trying to figure it out. My car is super consistent now. I found SS spring work well they work todays radial drag tires.