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Re: Rear axle question
The 3.08 gears are on a 3 series carrier from the factory. If you want to go to 3.73's on the 3 series carrier you can use a "Thick" gear set. That is what I did with my Burban.
Do you currently have a posi?
https://americanpowertrain.com/shop/...-a-3-73-ratio/
https://www.differentials.com/techni...arrier-breaks/
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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