This is the Explorer that would be pulling him:
1991 Explorer Sport 2dr
5.13 gears, lockers
Transfer case doubler, both cases manual, final crawl of 117:1
M5OD 5-speed transmission
31-spline 8.8 rear with discs
Dana 35 hi-pinion front with 760x joints, F-150 coils and shocks, manual hubs...