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i have a 87 cutlass supreme 350 with 305 heads , rebuilt th 350 with shift kit in it , im changing the rear end gears and carrier over to an eaton true track posi , what size ring and pinion should i go with , thanks
 

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Hates: Liver. Loves: Diesel
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That's like asking "what size pants fit me?" Dress slacks? Work jeans? PJs?

You gotta let us know all the details. How will it be driven? What cam is in it? What's the stall speed of the converter? How tall are the tires? The answer could be anywhere from 2.73s up to 4.56.
 
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