HELP! I think it's time for a little more useable power... I know a lot of people will tell me to swap for more displacement but, I'm on a working man's budget... with a wife... a young'un, and a dog... I am looking to gain about 30 hp and 50 lb/ft, putting me at roughly 320hp and 350 lb/ft. Idealy I want the power gains to be in the the top end (ie. intake/heads). Oh, I will be towing light trailers (up to pop-up campers/vehicles). My questions to all of you are: A. Is the stock intake resrictive enough to warrant a cold air, or other performance intake? And, what kind of gains are you seeing (not what the manufacturer says) B. LS Swappable PARTS!? Will LS heads from a car (corvette, camaro/firebird) swap to my LR4? What kind of modifications (thicker headgaskets, redoing valve geometry) can i expect? And of course... Power gains?! I think it goes without saying that I will be driving this truck a little less than a daily driver and I do not feel the desire to have to run 100 octane... Any other advice/direction will be considered! Thank you guys!