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Re: My 63 Project
The 63 & 64 12 bolts were 17 splines. They went to 30 spline in 65. The 12 bolt 17 spline posi's are out there, but will take some looking. Took me 2 years to find one. Most guys w/63 & 64 trucks convert to the newer 30 splines since parts are readily available as are the 30 spline posi's. Both are stil 8.875"
Let me know how it works out though.
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