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I have a 63 chrysler with the 741 carrier(open)i want to put a posi in that rear end housing but from what i,m told i need to add axle shims when your going from a open rear end to a posi...mancini does not sell those shims..any old fart heads know what thickness shims i need....my chrysler books say i need them but they don,t say how thick or a part #(these axles have the big nut that hold them in)
thanks in advance

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I cant answer your question but that big nut at the
drum is what holds the drum on(with a key way and key)

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Well crap(u were one of the old fart heads i thought i could count on..lol..j/k)If i have to i,m just going to weld up the spider gears...poor mans way of haveing a posi...i know chirp,chirp,there goes a axle...then i,ll just have to put a dana in it..