Back in the day when I was growing up, people used clothes dryer hose to the front of their car (427 Thunderbolts)
http://home.bresnan.net/~dazed/RamAir. If you go to Home Depot the gutter drain section has some end peices that could be used and also in the ac/heat ducting section. It would be better to spend $30 bucks experimenting first. Ram air really only helps at the upper rpms