The Ramjet intake works well on Vortec 350's.

http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/Ramjetintakedynochart.jpg

From this engine, Vortec 350 Hotcam kit, 24x Coil Near Plug...

That engine is a stock Vortec 350 with 4 bolt mains. Its rated at 255 sae net hp @ 4600rpm/330 sae lb/ft torque@2800rpm.

Put it on an engine dyno and you will see about 310-320hp. The stock...