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Re: Dana 60 Ratios
Yes, its accurate. Page above is from the '71 Data Book, but it pretty much sums up the info for a K20. Now your truck per the '68 Longhorn specs. would have the 4.57 as base standard. With the M20/292 the ratio gets bumped to the 4.10. An optional ratio is not listed for that powertrain either. The 3.54s were only seen in BB trucks. I'd be suprised if yours has factory 3.54s (as built) with a M20/292. You stated "My truck says 3.54." Where does it state this? I'm thinking that your truck has had an axle/ratio swap somewhere along the line. Below is the '68 Powertrain Chart and a Dana axle ID chart.
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