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Old 12-12-2025, 05:50 PM   #19
Orange Crate
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Join Date: Feb 2011
Location: Under the Truck Dreaming
Posts: 888
Re: Lifting my 1967 K20

There are lots of gear calculators on the webtubes. You can input your trans gears, final drive and tire size to see what your engine RPM might be with the different combos. Here is one I used.

https://www.blocklayer.com/rpm-gear
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