you could find one from a ranger. some of them came stock with 4.10s. the 4.0s had 8.8s, with the FX4s and Explorers being 31 spline axles.
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1988 Ford Ranger XLT 5.0L - project
2000 Ford Ranger XLT ex-cab 3.0 -daily
www.cardomain.com/id/gaelicvyk