The rear alcan springs were a little to stiff. But then again they were designed for a load i dont carry in the rear any more (a spare tire and tool box). I really like the Chevys, even with 3" blocks not very much axle rap at all. I kept the overload leaf in but cut it off right past the u-bolts, and left the front. I also have terra flex revolvers on with them, the two were ment for each other.
The front alcan springs work very well. I was just getting greedy and wanted more flex. I know i can get more from a longer spring. Thats why i wanted to try the alcan rears up front. But i deffinetly do need a better shackle ange in the front