I have discussed this with Bill a couple of times and he said that he dynoed this type of mod several years ago when he was working up the calibrations for the EDGE Evo tunes. I believe he said that he also tried it with the snorkel removed just breathing air from the engine bay and it showed about the same gains. Personally, I like the idea of going back to the fender and taking cooler air from the stock location since cooler air is more dense and makes more power. Also that location is less likely to ingest any water unless you manage to submarine the nose of the truck, in which case the last thing you will be worried about is where your intake air is coming from.
