There’s no 3.5 in a 3/4 ton or 6.6 in a 1/2 ton. As was mentioned earlier the 3.5 seems to pull about the same as the 6.6 in the 3/4 ton. The 6.6 has to overcome more and is tuned to do as much. The 3.5 would struggle in the 3/4 ton. Blown small engines need RPMs. A naturally aspirated larger engine is good at lower RPMs. That’s where the Apple and Orange comparison comes in.
I’ve been watching. To be honest (I always am). I couldn’t log on for some reason. Im technically challenged. Then I misspelled my email to start anew. Frustrated I just stopped trying. Then I had some work on the house. That usually leads to more. It’s been busy.
It’s not really apples, it’s apples and oranges. The Ford engine mentioned would be hammered by the addition weight. It’s all about application. Half tons can be configured up to 14K. But wouldn’t be as stable as a 3/4 ton. There’s a ride and fuel mileage trade off. It depends on usage.