So, Randy, are you now like the libs who only want to hear one opinion, as long as it's theirs? Let a buyer listen and research and make his own decision. Anyone reading the actual F150 forums will find that the negatives of the Eco outweigh the negatives of the 5.0.
And...you think you are going to build a 3000 horsepower 540 and put it into a daily pickup chassis. That's not just clueless; you've lost your mind. Lots of people giggling at you.
Get over your 3.5 butt hurt. It's overkill for the weight the OP is towing.