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There was a snag when installing the rocker arm system: A few of the spacers between the rocker arms made contact with the pedestals on the cylinder heads. Hafliger had to cut some material off the face of the spacers to make room between the rocker system and the pedestals. Also, check out the 11⁄32-inch, 0.120- wall-thickness Manton Series 5 chromoly pushrods. They are hollow so they can accommodate the through-the-pushrod oiling required by the T&D rocker arms, and they measure 7.375 inches long. Hafliger needed to grind the pushrod tubes in the cylinder heads to ensure enough clearance for the larger-than-stock pushrod diameter.