7 row mocal on an O-360 in a DR107 has worked for me for 4 years. Definitely heavy duty due to start up oil pressure surges. Will post a link to pics tomorrow.
Pete
I have a new one if you need it. Comes with the 90 deg fittings. I may even have the brackets I made. I did some upgrades to my engine (more horse power) and placed a bigger oil cooler on the plane just in case. I also installed an oil cooler shutter. The engine I have previously ran with the same part number oil cooler for over 1200 hrs and never had a problem. It was rated for 160 hp. Please disregard the wires. My plane does not look like that any more.