Hopefully in the next 30 days or so, I'll be receiving the new motor for the '72K5.... (502BBC) Not long after that, I expect to be having lots of leafspring problems due to axlewrap, so at the very least I'd need to add some sort of traction bar setup. I'd been wanting to add a softer set of leafsprings to more closely match what I have up front to get a bit more flex out back, but that would just make the axlewrap problems worse. As I was thinking it over, I realized that I already own a complete set of expensive, rebuildable heims. So for the price of some tubing (which I'd need to buy anyway to build the traction bars) and an inexpensive set of coil springs, I could actually just 4-link the rear and be done with it. I also have a set of Bilstein 7100 reservoir shocks that never got installed, so that might be a nice upgrade to add at the same time. The whole thing could probably be done fairly cheap...... the only thing I need to figure out is where to go for a ~250Lb/in coil spring that would give me about 5" of lift and maybe 14" of total travel???? Any ideas? The rear of the truck weighs about 2500Lbs, and I can fabricate the mounts any way I want to accomodate the spring. I just need something with enough overall height to allow for the flex without binding.