You need hydraulic pedal assembly, (R is 2wd? Right) if so grab a NV3500 from a 90's 1/2 ton gives you overdrive. And that should be it, maybe the driveshaft yoke will need to be changes to correct for spline out put changes. Not bad at all. Oh, plus appropriate flywheel and clutch, plus the master, slave and clutch lines.
The hydraulic pedal assembly is typically the hardest to find.
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