I kinda doing something like that. I have built snorkels for a few other projects, just never a Dodge. And with out a doubt, the hardest I have done. There are several issues that make it difficult. One, just the general design of the hood and fender. The hood actually raises up a little as it opens, so a flush mount to the hood is impossible. The fender is way curvy and all kinds of fits following that line. The other option that could have worked was go through the hood or notch the hood, but the Dodge hodo sits on hinges that are preloaded.... like the old Chevy hoods. Bending the hood was a real concern. There were some natural places to come up through the hood but again, those hinges got in the way.
I know I can rig something up but I want this to look good as well as perform well. I plan on haveing this truck for a long time and want to do a nice job, other wise it will bug me.