I have completed the axel swap to a higher ratio from a Motorhome. The axel I used is a Dana 80 from a 1990 GM chassis, it has a 4.88 ratio. My axle has a 10 x7.25 bolt pattern with disc brakes, these were also available with drum brakes. My top speed is about 62 Mph @ 2800 RPM.

Last edited by TUTS 59; 11/25/2024 2:04 PM.
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1958 Viking 4400
"The Book of Thor"
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1960 Chevrolet C10
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane