there is a mud racing pit up the road for me and a lot of those guys run a cai-like pipe straight through the firewall into the cab with a k&n on the end of it.
http://www.ncmudracing.com/maphotel.htm
that place is great too, bring a grill a cooler full of beer and sit back and watch those guys run all day long.
a friend of mine used to have a blazer that he did that do and he was out wheeling with a bunch of big trucks, trying to keep up. he had some redneck nitrous too, his passenger was sitting behind the end of his intake pipe and he gave him q's on when to spray ether into the pipe. thats about as redneck as it gets right there.