If you are going to buy a truck, might as well get one with a real truck engine. Get a V-8 and don't mess around with a hopped up 6 cyl. You can never replace displacement when you are working your truck. Most new V-8 engines have as much or more HP and torque as the eco-bust, and get equal fuel mileage. Not here to argue this point, the numbers are out there. When it comes to towing, bigger is better.
Becky, Bob and Taylie & Bode
2009 Silverado 2500HD Duramax/Allison
2014 Heartland Sundance XLT 245RL
His and Hers Polaris 570 Touring ATV's
2018 Polaris General 1000