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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#29987 06/04/2003 4:56 PM | Joined: Jul 2000 Posts: 962 Shop Shark | | Shop Shark Joined: Jul 2000 Posts: 962 | Poncho rears had an axle code stamped into axle tube (usually driver side). clean the gunk off and get the code, it'll tell what car, ring gear dia, & ratio was stock for that rear.
Assuming its a 10 bolt from a '69 GP, its likely a 8.5" and could have any common ratio (depending on carrier) between 3.08 to 3.70.
good luck
chip
Preaching the Hot Rod Gospel according to the 4-stroke apostles:
Suck, Squish, Fire and Fumes
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