Just wanted to see if anyone uses these on there Z28. I know they are suppose to add power. But wanted to see if anyone really feels the difference while driving with these parts. Any comments would be appreciated.

thanks
mark

The first time I built my car I used the same set up but I used the lightest advance springs and weights possible .This allowed for max. advance at a lower rpm and this was great for an almost stock engine. I have long since up graded to a complete MSD system along with countless other modifacations and planning for more soon!