i believe i have the 7.5 rear, the grand nats got the better 8.5 ones. Steve can correct me if i'm wrong, all i know is my current rear is a stock unit from a 88 monte carlo SS w/3.73 gears. I have my old SS rear out back somewhere and the torsen in that may be good, so someday i'll open that up and see if its salvageable.
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