I plan on doing a tranny cooler install this spring but I was considering also of getting a dual circuit unit and running my oil through it as well. Has anyone done this? On my last drive to Florida from NC I burned up my oil and tranny fluid so I'd like to get this done if possible.

I would recommend two separate cores. These fluids operate at different temps, so using a dual core would almost defeat the purpose. I would mount the 2 cores tall in front of the radiator, one on each side of the center post.