The Saginaw steering box pictured has a 76 cast into it. The 76 boxes have larger bearings and extra ribs in the casting. This type of unit is stronger than other boxes, which makes it a good choice for power-steering conversions on Jeeps and Land Cruisers. The threaded inlets and outlets on steering boxes should be inspected for damage and debris. If it looks to be contaminated with dirt or water, find a different box.