I picked up a trans cooler at a swap meet with lines and fittings for $15 the lines aren't long enough to reach up front so I mounted it in the wheel well, you could also use the presslock hose, it should take the heat and pressure nut the braided would be the strongest, also if you check with rubber suppliers, hydraulic fitting shops and diesel parts shops for large diameter rubber hose that'll take the heat and pressure, you'd be amazed at the stuff they have, and while your at it you can buy the JIC fittings instead of the AN, they use the same flare and the AN but they are made of steel, weigh more but cost less