I am looking to replace or rebuild the engine in my 91 Power Ram 50 with the 3.0 V6 and 4 speed automatic. Does anyone recommend any rebuild kits? What other engines fit in our trucks? I want to keep my transmission since I do need 4x4 in the winter, unless there is a other option that will still allow me to still have 4x4. Also my overdrive isn't working can anyone help me with that as well.