superstock springs rear clamps?

I had Super Stock springs on my Demon and all I did was put them on and set the pinion angle at 2 degrees. I also had 2 in lowering blocks on it because I did not like how high it set in the rear. I had a best 60 ft of 1.36 on a 100 shot of NOS. It was a stock interior car with no roll cage, small block.