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.
For what you are looking to do the halo is hard to beat. It will completely fog the air intake track Vs a nozzle having a single beam of nitrous discharging into the air stream.
Deffintly go for the Halo if going dry through the mass air meter.
http://www.nitrousoutlet.com If you want the highest quality, highest flowing products backed by the most knowledgeable staff with full time tech service that answers the phones full time, responds to pms, emails and post on the boards with technical information our products and our company is the choice for you. "The Bitterness of Poor Quality Lingers Long After The Sweetness Of Cheap Price Is Forgotten".
Last edited by Nitro Dave's Nitrous Outlet; 03-13-2012 at 11:32 PM..