I'm also looking into lowering a 4x4, my '95 k1500. Something different, and I want the 4x4 for the snow. Drop keys are the only thing I've found to date for the front. It's unfortunate so many people just hate the idea and there is very little information out there about it. I have keys and drop hangers waiting to be installed and I'm going to just see how far that gets me and go from there.
88-98 4WD Front Coilover Kit (Diggin_Z71) - Atomic Fabrication
This is a kit that includes the parts needed to replace the torsion bars with coilovers on (k1500) 88-98 trucks. See below for more information.
atomicfabandperformance.com