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One trick we learned from dyno operator Ed Taylor is to not plug the heater hose connections, since this affects proper coolant flow. If you don't plan to use a heater, create a loop between the heater hone connections. Another tip is to use ARP stainless metric studs (PN 400-8034) instead of header bolts. The header installs easier and there's less risk of tearing up the threads in the aluminum head.