I'm not sure what you mean by "nose cone"?
It's the piece you need to change on the transfer box to turn a non-CDL box into a CDL box: take a look at one with CDL. See where the linkage goes to in the front? That's the piece that comes off. It's not anywhere close to NEARLY impossible, nor is it a serious modification. As I said in the very post you quoted, you don't even need to drop the box to swap them.