[big gear head]

I had a guy bring me a bare '70 Chevelle 12 bolt housing that he wanted built for his car. It had been sitting outside for many years with nothing inside it and it was very rusty inside. I capped both ends and plugged the pinion hole and vent. I leveled the housing and filled it with about 3 gallons of evaporust and left it for about a week. It looked like new metal inside when I drained it. There were some pits from the rust, but you can't do anything about that.