I went a different direction on my Coyote build. I simply used an extra long return tube and coiled it into a spiral of about 3 turns of 12" in diameter. I mounted the coil behind the radiator around the fan motor. This allows the air that has passed through the radiator (warmed, I know) to pass around the tubes and cool the fluid. There is much more tubing involved than in the small oil cooler I bought and once the tubing is painted black, it is hardly noticeable in the engine bay.
I do not plan on auto crossing much if any and the solution will keep the fluid temp more reasonable.