[jonnyk]

Gonna need a lot more intake than that - I'd try an Edelbrock RPM 2 or Holley Systemax.

For a cam, best bet to even get close to that power level would be a custom. If not, there are probably a couple of Comp Cams grinds that will get you close.

Shoot for over 10:1 compression with that setup.

400 rwhp isn't exactly easy with a 347.