Not sure if the 5.0 was a piece of junk as far as quality, but it didn't put out the power you would have expected from that size (thanks EPA). Remember the nickname 5.slow? But with the right mods, and there are a lot out there, you could get something that would tear down a stip. Ford has proven the ecoboost by torturing it for 170,000 miles with better than acceptable wear. Since it has that low end torque, you don't have to get high revs to get power out of it. Engines are more likely to blow from high revs than high resistance. That is saved for the trany. Not sure or not if it is the same trans that is hooked up to the 6.2 or not, but I would worry about that more.