Steering Box
The manual steering box has a 22:1 ratio (5.5 turns lock to lock) and power steering box has a 16:1 (4 turns lock to lock)
Below is a photo '74 steering box next to a '71 steering box. Next photos show difference between a manual Pitman Arm and a power steering Pitman Arm. Last photo showing the difference between the 70-74 and 75-77manual steer center link.
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