CAGE has progressive-rate Bronco coils readily available for around $150 per pair. These are so well priced that they are the cheapskate plan. Directly below the coil, you'll notice the lower coil bucket from a '66-'79 Bronco. We bolted these directly on top of the radius-arm axle brackets using two Grade 8 bolts, just as Ford did from the factory. Again, CAGE will have new pieces available, or you can forage for yourself in a junkyard.