Re: Muncie Speedo Gear Question
Here is the info on my 69 L78 M-21, 4.10 posi. The tag on the sidecover is 3950316 and the adaptor is 6476736 with a ratio of 1:.777 and has a blue driven gear with 20 teeth. I also have a 69 RS Z/28 with an M-21 and 4.10 posi and no adaptor. The tag on the sidecover is 3946798 and has a driven white gear with 25 teeth. Attached are pics of the adaptor.
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