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With the bottom of the brackets cut to mate cleanly with the rearend shape, they were slid into the upper bushing holes and bolted on tight. The next step was to drill a 31/48-inch hole through each rearend upper bushing behind the bushing hole. This is for the DMR 31/48-inch anchor bolts. Since these upper brackets were aftermarket pieces, two spacers (arrows) were created from a 1-inch-diameter bar by drilling a hole through the center and then welding them to the rearend bracket. Whitey Brown at Wheel to Wheel Powertrain in Madison Heights, Michigan, did the work for us-again, this fab-work wouldn't be required on a GM 10- or 12-bolt.