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Re: Which POSI wil fit my 69 C10 3 series Differential
The Posi IS the case...
Yes, the 3.07 have a 3 series case. The 3.73 (right?) are normally in a 4 series case, but you can buy a thick gear as it looks like you have done. Now you just need to buy a 3 series positraction to fit your gear.
I would by the Eaton or the Yukon DuraGrip. I prefer those over the Auburn unless you can still get a Pro with clutches.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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