Mike, when looking to replace our 06 duramax i found one dealer in Columbus that said go hook it up and try it. I was surprised, I grabbed my dads 249 Glastron mid cabin that weights over 7,500 with trailer and non working breaks. I was surprised how will it did. Just can't get rid of the Duramax until it starts costing more than fuel, want 200k out of it. Only 10,500 more miles. Sorry about your F350, hope you enjoy the new F150