Yes you can change it over to the old buttermilk transmission, but reliability is really poor, plus doing that will really reduce the value of the vehicle. You will need to find a transmission with all the equipment that goes with it including the cooler, shiftier assembly and tubes. If it was my rig I would leave it alone and use the money you would spend converting it and buy an automatic vehicle. by the time you find everything you need and the labor involved you could spend anywhere from 2 to 2500 bucks to have it running down the road and then start saving money back for tranny repairs cause you will have them.
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