I like the look you are going for, I dont know how big of a person but I would consider personal size before channeling as deep as the inspirational truck. I would think even a person 5' 6" would struggle to be comfortable in a cab with that much chop and 4 or so inches of channel.

The safety issue is also there, as mentioned it wouldnt be fun to have a blow and the body to drag ground. Air bags can be used to get the body drop to lay frame or cab if you desire it.