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Using Dynatrac's detailed order form, we were able to spec out a complete high-pinion Pro-Rock assembly with a driver-side differential, 31 1/2-inch leaf spring spacing, and a width of 74 1/2 inches to work with our Hutchinson bead-lock wheels. After the tubes were cut to length and machined to the proper diameter, the end forgings were pressed on and welded in place. The two tubes were then joined with the centersection to form the housing in Dynatrac's horizontal press.