We offer 100% new casting 12 Bolt housings for leaf or coil spring applications. All of our 12 Bolt housings feature new 3" tubes and large bearing 9" Ford style housing ends. This allows the use of positively retained, bolt-in style 9" Ford axles which provide a far larger axle bearing, eliminate C-clips and open up available brake offerings to anything that is available for a 9" Ford. Units still retain Chevy wheel bolt pattern, or most any other wheel bolt pattern you may need.