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Dan's system (pictured below) is a four bolt main cap conversion requiring some fairly involved machining. ..... He lists his setup as withstanding 1500hp and I'm not in a position to doubt him.




Dan has one customer with a Blown Alcohol Tractor pulling rig that is exceeding 2500HP on one of his 4-Bolt conversions. Would not have believed it if I hadn't seen it with my own eyes.