overdrive question

[FRANK PKNY]

I just purchased a 1965 F100 three speed with overdrive. Seems someone hacked up the overdrive wiring. I'm putting it back together correctly. Having never worked on an overdrive unit before , I've been studying the wiring and operation of the unit . so far I have managed to only find a wiring diagram for a 1967 overdrive unit. Wondering if anyone knows if it's the same as the 65? Also I would like to find out about the function of what the diagram calls the governor? By the way the circuit goes it looks like it may short out the distributor via the white wire from the governor ! I'm not sure about this function. If anyone has some insight about this it would be helpful. Thanks in advance. FRANKPKNY