727 question

RaniDart70 said

ok, why do the later ones have a huge weight on the end of the tail shaft?

I found that the 78 is a runner and has not been out of the car long.

This is for use behind a mild stock 440

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I think you are referring to the governor weight. That controls when shifts occur based on revolutions. Not needed for manual valve bodies. You can actually change the weight to tune your shift points.