me..
I'm using a Long stacked plate design cooler, with Aeroquip stainless braided -6an line.
it will be plumbed into the lower radiator trans line. I am using two straight AN fittings for the cooler side, which goto -6AN to 1/2" npt male pipe thread. Then on the other side, I have a 180* -6AN fitting, to a -6an to -5 (i think) pipe thread (it basically lets me attach the AN fittings right to the exisitng unions on the stock lines...
I used braided stainless because it will last.