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Re: Differential Question
After several searches on car-part.com, it looks like...
2wd could have 10 or 12 from '78-'81
4x4 could have 10 or 12 from '81-'83
So, '77 was the last year that everything had a 12 bolt, an '84 was the first year that everything had a 10 bolt.
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-Andy
'77 K5 Blazer
'78 K10 Shortbed
'78 C20 Suburban
'79 K30 Crew Cab Dually
'84 C10 Short Stepside
'88 K20 Suburban
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