Ram air is definitely the way to go for FE. The more air you can stuff into the intake without consuming extra energy, the less work your engine will have to do breath in. Its pretty simple. Also the colder the air the better. Check out all the autospeed articles on the subject. This has been proven over and over again.
EDIT:
I'll cut and paste the articles here from the dead thread for easy access.
HAPPY READING
Eliminating Negative Boost - Part 1
http://www.autospeed.com/cms/A_0629/article.html
Eliminating Negative Boost - Part 2
http://www.autospeed.com/cms/A_0637/article.html
Eliminating Negative Boost - Part 3
http://www.autospeed.com/cms/A_0646/article.html
Eliminating Negative Boost - Part 4
http://www.autospeed.com/cms/A_0652/article.html
Eliminating Negative Boost - Part 5
http://www.autospeed.com/cms/A_0663/article.html
Negative Boost Revisited, Part 1
http://www.autospeed.com/cms/A_107824/article.html
Negative Boost Revisited, Part 2
http://www.autospeed.com/cms/A_107825/article.html
Negative Boost Revisited, Part 3
http://www.autospeed.com/cms/A_107826/article.html
Negative Boost Revisited, Part 4
http://www.autospeed.com/cms/A_107827/article.html
Negative Boost Revisited, Part 5
http://www.autospeed.com/cms/A_107828/article.html
Doing the Impossible
http://www.autospeed.com/A_109877/cms/article.html
Modifying the VL Turbo Intake
http://www.autospeed.com/cms/A_0779/article.html
Into the Intake - Part 1
http://www.autospeed.com/cms/A_1361/article.html
We Have a Record!
http://autospeed.com/cms/article.html?&A=109217[/QUOTE]
Ram Air Project
http://www.karlsnet.com/mopar/ramair.shtml