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#10
12-17-2016, 12:06 AM
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Re: 1969 z code 10 10 cool
3.73 was standard, but posi was extra, although recommended. 4.10 was the performance, 3.55 the "economy" (there's a euphamism for "10 mpg instead ot 9.5"
 .It MAY be that when other things were made mandatory later in the year, posi was as well; I'm old and can't remember, but someone on here knows.
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