So you're essentially adding a second radiator for the coolant? or am I misunderstanding? You already have a coolant radiator, if you want to cool the coolant in hopes of lowering oil temps, this is not a good way to do it. Get a real oil cooler to cool the oil. Get a real radiator to lower coolant temps.
Jackson Racing makes an upgraded radiator / oil cooler, which may be more what you're looking for. It's also stock location, but I'd look to upgrade the oil lines, I've read stories of them leaking / kinking easily. Sell the oil cooler you've got now to recoup some of your expenditure.
http://www.ft86speedfactory.com/jack...2013-ft86.html Here is a link to the product I am referencing.