Hello all, this will be my first post here and was hoping I could get some help fixing my barko 80. I purchased a truck mounted barko 80 a week about without the power unit. The loader still has its original hyd pump with 3 ports hooked up just laying to the side. I recently bought another power unit off a Dunham 850 complete with bell housing and 6 port pump, 3 stage is the correct terminology I believe. Is this possible to use? If so what would you do with the unused ports? I know this pump is way bigger than needed but since i have a matching pump, shaft, housing and engine I would like to use it to save from building a housing and trying to locate a shaft that would fit.