id spend the money and get link and the 255hp with the fpr so that way you have yourself set for what ever you wanna do in the future

i dont really trust safc's too much, they can be .. unstable
they dont pull 100% accurate everytime
and the link will allow you to tune alot more than just the fuel

and if you get link i 110% recommend Darkside Performance for the tune
drew and Z will get your shit tuned right