Im pretty sure with piping and an intake they say you should run a controller, so IMO you are already on the borderline, I would 100% recomend a controller,
My 07 M8 has Speedwerxs pipe,can and Ypipe, Boysen reeds, RK-tek Head and porting, BDX intake and I run a boondocker box, Yes the porting makes a big difference but on the top end im running 22% more fuel and 15% more around 6000RPM.... Maybe try it first and check the plugs every 10 minutes but make sure you check them at WFO because thats where the sled is going to want the most fuel. I would also recomend you post a wanted add or look for some adds already up for a control on swapmeet. I got my boondocker box for 175$ in like new condition from there.