I think a wet nozzle can be tricky to hide. When mounting it vertically in the places you suggest (I don't see it being horizontal), even if you get pre-bent hard lines (for example), it's still kind of an overall tall assembly that might get in the way of the radiator or possibly the water pump pulley. You could put everything inside the lid, provided you're not running a MAF. The !MAF also applies to the "bottom of the back of the lid" location, assuming you have the typical f-body intake setup. I'd suggest Nitro Dave's MoneyMaker setup for a good hidden wet shot. It looks like an intake manifold. That's it.