Tunnel Ram on a 383

http://www.hotrod.com/how-to/engine/hrdp-0712-mopar-intake-manifold-comparo/
part one

http://www.hotrod.com/how-to/engine/hrdp-0801-mopar-intake-manifolds/
part two

The Weiand performed awesome in this test, even compared to the other tunnel rams they tested.