XE282S in my 408??? Big enough or bigger?

If you have the budget get a converter custom made for your combination. My car used to hook up once it got over 35 mph. Now with the better converter it can break the tires loose at 45 mph in second gear just rolling on the throttle not even trying. A good converter can make a huge difference in how the car runs. And I am turning a couple hundred RPMs less out on the highway too. I had Brian at IMM custom grind the cam in my car and it only cost a little bit more than an off the shelf cam.