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It all starts with the Edelbrock Victor high-performance water pump. The studs on the left are special and critical in length. If the wrong studs are in place, the A/C compressor bracket can be cracked. Since the studs are discontinued from GM, it's best to find a complete assembly. Another critical area is where the heater hose return fitting threads into the water pump. Over-tightening this area can crack the mounting boss, and you'll think the lower radiator hose is leaking.