Rear spring eye contacts frame

Hi, I just installed caltracs on my 71 Duster, Springs moved in on frame. I am wondering if anyone has had this problem. I am using the stock rear shackles. And the spring eye is contacting the frame. It looks like at the very least I need longer shackles. I cant find anyone that sells longer adjustable good quality rear shackles. The lower hole on the spring is rearward of the upper hole in the frame. Any ideas. Thanks