Sell it. Not worth the noise and/or hassle to tune.
Best 3.6r mods for the money to make good gains are in this order:
-Basic maintenance
-Suspension: 26mm Front bar, 13-14 Springs and dampers, Whileline 22m rear bar as a basic daily package, go wild from there.
-Tune
-Raptor Headers, high flow cats & Y-pipe and a Tune
-Raptor supercharger, headers, high flow cats & Y-pipe and a Tune
-Raptor supercharger, headers, high flow cats & Y-pipe, cat back and a Tune
-Custom build spending a ton of cash to have a hot 3.6r.
See XRT for a tune.