The Lack Plate is going to set motor back however many inches you get. Let's you raise motor higher and prop stay in clean water. Better hole shot and usually more speed. Lot of times helps stay higher on plain at slower speed. Hydraulic lets you run in much shallower water. Neg is father back motor is more weight aft of centerline stern dips lower in water. Need to add water pressure gauge so you don't lift motor up so high you burn it up. Don't know anything about your mounts for pole. I would take that question straight to manufacturer.
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Charlie Weaver USN/ENC 1965-1979