the oil cooler setup came from several sources. the cooler came from Hoerr Racing products (
www.hrpworld.com). The hose and hose ends came from my local Aeroquip dealer. FYI, they have roll leftovers that they sell at a reduced cost/foot. You just have to dig until you find the right length. Call your local airplane mechanic to find the best location in town. The other adapter fittings came from BAT, Inc. in FL. I am using a Mocal thermostat mounted in the pass rear wheel well.
I do expect a noticeable change in temperature. The problem is that I can't give you a number. When we bought the car it was too rusty to drive hard enough to get really hot. After lots of surgery its finally ready to go. With the 2.7 oil temperature is key. My cooler is sized about 20% smaller than a Carrera Fender mounted cooler. I think I make up in airflow what I loose in capacity. Time will tell if this is true but other's have noticed the same effect.