Make it handle

[jfnar]

Here's a simple question that may have already been addressed but I don't have time to read through 79 pgs of posts and the search didn't find anything. I have a 68 swb with coil rear springs. It sits unlevel so I think I need to replace the springs. What's the best replacement coil spring to get the best ride on a stock height truck? No racing or hauling, just driving. Thanks.