I have been running Cal Trac bars on my 69 (Z10) for years , my car has a 427 in it putting out 500 hp & 500 TQ the other day I took a buddy for a ride I nailed it grab 2nd gear & hear something pop. I looked around and could not find anything until today. I was detailing the under carriage & noticed the bottom short leaf on driver side was moved forward about a 1 inch. In the past (it happened twice) I have scheard off the bolt that holes the springs together no doubt it happen again. Has anyone had this happen to there car?