Best gear ratio for windy rural roads street car.

391's 489 case sure grip . This rear is out of this Duster it had 38 k on the car . I am keeping the rest of the rear for my Demon I have a 355 sure grip for it and I need the housing mine was braced
DoctorDiff is out of stock. Just looked and they get $1295 for aftermarket parts. This rear is factory built low miles and in great condition. Car was rotted hard sat on the Jersey shore.

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