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The '84 Toyota pickups came with 22R engines that were reliable but that didn't offer much in the way of power and performance. Bryon solved that problem by swapping out the underpowered factory engine for a 4.3L Chevy V-6. A GM NV4500 transmission mated to a Toyota transfer case fitted with Marlin Crawler 4.7:1 gears transfers the power and torque to the axles.