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Old 04-05-2023, 07:53 PM   #18
special-K
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Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
Re: Posi rear differential factory option?

Quote:
Originally Posted by Casper42 View Post
that is all, period. the guide shows this in two places. you get one or the other and that's it. it all appears to come down to what engine and what series - C/K10 v. C/K20, etc.
What I am saying is that is incorrect or incomplete. My actual life experience says different. Sorry to disappoint you. A manual truck did not come standard with 3.08s in these years. I showed you two trucks I actually owned. I never read your book. I can show you more trucks, though.

The yellow '72 had TH350 and 3.08s and factory fr & rr posi. The green '71 had 3spd (changed to TH350) with 3.73s and factory posi. I installed detroit locker rr & TruTrac fr. This was early 80s, both truck original when I bought them, same as the two sort beds
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