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07-13-2005, 03:07 PM
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One of the few GMC'ers
Join Date: Jul 2005
Location: Des Moines, Iowa sometimes Butler, PA
Posts: 146
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muncie in my 69?
id like to get rid of my turb 400 and get a muncie 4 speed. i got a mildly built 396 in a 2wd truck. my question is what is the differnce between the m20 m21 and m22 muncies. any one else here running that combo?
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