For an oil cooler setup, is it better to have the feed and return lines on the bottom of the cooler, the top or the sides? OEM DSM coolers have the fittings on the bottom, just wondering if having the feed and return in a different location would affect oil flow through the cooler. I was planning on mounting a cooler where the stock US OEM intercooler went, with lines running from a 90 DSM oil filter housing.