I have a 1969 Dynahoe loader with a Detroit 3-53 engine

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I want to adjust the injectors and the valves. I have done it before when i was a mechanic in the Air Force but that was in the early 70's. I do remember that I need to disconnect the governor spring and set the gaps. I don't have any spec ts or procedures manual to go by.If any could help me with this info I would appreciate it